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2622 lines
84 KiB
Plaintext
2622 lines
84 KiB
Plaintext
;
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; File: ScaleBlt.a
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;
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; Copyright: © 1989-1990, 1992-1993 by Apple Computer, Inc., all rights reserved.
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;
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; Change History (most recent first):
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;
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; <SM9> 7/6/93 kc Roll in Ludwig.
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; <SM8> 7/6/93 kc Roll in bug fix from Shannon Holland.
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; <SM7> 01/19/93 HI #1060484:Fixed bug in scIndToInd where it was not
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; properly offseting while masking. Fixes bugs where
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; >1 bit images are clipped and some garbage is drawn
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; as a result. For a detailed information of the bug
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; fix, read the header of scIndToInd. (Hoon Im)
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; <SM6> 12/4/92 CSS Revert SM5 as SM4 already fixed this bug.
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; <SM5> 12/2/92 kc Roll in <R22> from QuickDrawPatches in Reality.
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; <R22> 8/13/92 SAH #1039892: Fixed a bug in the ScaleBlt 1->16 non-colorizing loop
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; (scIndexedTo16) where the bit offset into the source would be
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; trashed in certain cases.
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; <SM4> 8/14/92 CSS Update from Reality:
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; <8> 8/13/92 SAH #1039892: Fixed a bug in the 1->16 non-colorizing loop
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; (scIndexedTo16) where the bit offset into the source was being
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; trashed.
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; <SM3> 7/16/92 CSS Update from Reality:
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; <7> 6/8/92 SAH #1031825: Added indexed to 16, 1 to 16 (no colorizing), indexed
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; to 32 1 to 32 (no colorizing) and indexed to indexed loops. Also
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; pass the real XLateFlag to MakeScaleTbl so that it colorizies.
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; <SM2> 6/11/92 stb <sm 6/9/92>stb Synch with QDciPatchROM.a; added comments to
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; NXTMASKDither.
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; <6> 11/6/90 SMC Fixed alignment problem in scInd1ToInd8. With KON.
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; <5> 9/18/90 BG Removed <2>. 040s are behaving more reliably now.
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; <4> 9/14/90 SMC Added five scaling blit loops, w/ or w/o region clipping. 1to2,
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; 1to4, 1to8, 8to8, and 8to1. The latter three are replacements
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; for the QuickerDraw routines in Stretch which give the same or
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; worse performance of the new, smaller routines.
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; <3> 7/20/90 gbm Change a few identifiers to eliminate warnings
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; <2> 6/28/90 BG Added EclipseNOPs to deal with flakey 040s.
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; <1.5> 12/9/89 BAL Fixed bug in error propagation in DitherCore8
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; <1.4> 7/15/89 GGD GGD for the vacationing BAL, fixed the scIndexedto32 blit loop,
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; also disabled the Mask loop, since BAL says it cannot occur.
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; <¥1.3> 7/14/89 BAL For Aurora: Final CQD
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; <1.2> 6/30/89 BAL Now uses equate for qdStackXtra
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; <¥1.1> 5/29/89 BAL Blasting in 32-Bit QuickDraw version 1.0 Final
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; 5/26/89 BAL Fixed bug in call to MakeITable if seed mismatch during direct
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; to indexed copy.
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; <1.0> 4/12/89 BAL Blasting in 32-Bit QuickDraw 1.0B1
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scaleBlt PROC EXPORT
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IMPORT RSect
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IMPORT GetSeek,OneBitProc
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IMPORT TRIMRECT,MAKESCALETBL,SHFTTBL
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EXPORT scIndTab1,scIndTab2,scIndTab4,scIndTab8,scIndTab16,scIndTab32
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EXPORT scDirTab1,scDirTab2,scDirTab4,scDirTab8,scDirTab16,scDirTab32
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;--------------------------------------------------------------
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;
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; Transfer a rectangle of bits from srcBits to dstBits.
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; SrcBits and dstBits are of different depth or color table.
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; The transfer is clipped to the intersection of rgnA, rgnB, and rgnC.
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; No stretching, shrinking, colorizing, or bitmap masking is performed.
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; Only srcCopy and ditherCopy modes are supported.
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;
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; Custom search procs are not supported if the src is direct.
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;
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;
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;
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; COPYRIGHT APPLE COMPUTER INC. 1989
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; CUT AND PASTED BY BRUCE LEAK
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;
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;----------------------------------------------------
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;
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; A6 OFFSETS OF PARAMETERS AFTER LINK:
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;
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PARAMSIZE EQU 44 ;SIZE OF PARAMETERS
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SRCBITS EQU PARAMSIZE+8-4 ;LONG, ADDR OF BITMAP
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MASKBITS EQU SRCBITS-4 ;LONG, ADDR OF BITMAP
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DSTBITS EQU MASKBITS-4 ;LONG, ADDR OF BITMAP
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SRCRECT EQU DSTBITS-4 ;LONG, ADDR OF RECT
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MASKRECT EQU SRCRECT-4 ;LONG, ADDR OF RECT
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DSTRECT EQU MASKRECT-4 ;LONG, ADDR OF RECT
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MODE EQU DSTRECT-2 ;WORD
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PAT EQU MODE-4 ;LONG, ADDR OF PATTERN
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RGNA EQU PAT-4 ;LONG, RGNHANDLE
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RGNB EQU RGNA-4 ;LONG, RGNHANDLE
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RGNC EQU RGNB-4 ;LONG, RGNHANDLE
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multColor EQU RGNC-2 ;byte, set if source contains nonblack/white colors
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;----------------------------------------------------
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;
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; A6 OFFSETS OF LOCAL VARIABLES AFTER LINK:
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;
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; STACKFRAME LINKED AND LOCALS INITIALIZED BY STRETCHBITS.
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;
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&CurFile SETC 'STRETCH'
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INCLUDE 'DrawingVars.a'
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;-----------------------------------
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; REGISTER USE:
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;
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; A2: SRCRECT (24 bit addr)
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; A3: DSTRECT (24 bit addr)
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; A4: SRCPIX
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; A5: DSTPIX
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;
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; D3: SRCSHIFT
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; D4: DSTSHIFT
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; D7: INVERTFLAG
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;-----------------------------------
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;
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; SAVE STACK FOR NOW, BECAUSE WE'RE STILL ALLOCATING SCANLINE BUFFERS
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;
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MOVE.L SP,SAVESTK2(A6) ;PRESERVE STACK POINTER
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MOVE.L D0,NUMER(A6) ;NUMER := DST SIZE
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MOVE.L D1,DENOM(A6) ;DENOM := SRC SIZE
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;----------------------------------------------------------------
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;
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; DETERMINE AMOUNT OF STACK SPACE WE CAN USE
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;
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_StackAvail ;GET STACK AVAIL IN D0.L
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LSR.L #2,D0 ;CONVERT BYTES TO LONGS
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SUB.L #$200,D0 ;SUBTRACT SLOP FACTOR <1.2> BAL
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MOVE.L D0,STACKFREE(A6) ;AND SAVE FREE LONGS ON STACK
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bpl.s @stkOK
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_stNoStack ;=>NOT ENOUGH STACK, QUIT
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@stkOK
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;----------------------------------------------------------------
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;
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; IF THE SRC AND DST ARE DIFFERENT DEPTHS, THEN MUST DO PIXEL SCALING
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; IF THEY ARE THE SAME DEPTH, BUT DIFFERENT COLOR TABLES, DO PIXEL SCALING
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;
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MOVE.W SRCPIX+pixelType(A6),D0 ;IS PIXELTYPE DIRECT? %%%
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BEQ HasClut ;NO, IT HAS A CLUT %%%
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cmp #16,d0 ;is it RGBDirect?
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bne done ;unknown pixeltype -> go home
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;@@@@ should also check cmpCount, cmpSize
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;----------------------------------------------------------------
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;
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; The src is direct data (16 or 32 bits/pixel).
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; Compute D5 as index into direct mode table based on
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;
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; D5 = zero[15-6] dstShift[5:3] src32[2] gray[1] dither[0]
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;
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; D3=srcShift D4=dstShift
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;
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clr.l ErrBuf(a6) ; init for no dithering
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move d4,d5 ; init scaleRtn with dstShift
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lsl.w #3,d5 ; put into position
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cmp.w #4,d3 ; is src 16 bits/pixel?
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beq.s @src16
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bset #2,d5 ; flag src is 32 bits/pixel
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@src16
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MOVE.L ([theGDevice]),A2 ; get the current device (trash A2)
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cmp #16,DSTPIX+pixelType(A6) ;IS PIXELTYPE DIRECT? %%%
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beq DirectSrc ;don't makeItable on direct device
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MOVE.L ([GDPMap,A2]),A1 ; get pixMap's handle
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MOVE.L PMTable(A1),A0 ; get the device colorTable's handle
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MOVE.L ([A0],CTSeed),D1 ; get the device colorTable's ctSeed
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MOVE.L ([GDITable,A2]),A0 ; get the Itable's master pointer
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CMP.L ITabSeed(A0),D1 ; has the colortable changed?
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BEQ.S @1 ; if equal, then the iTable is OK
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; if table is not up to date, build a new one
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MOVE.L PMTable(A1),-(SP) ; push theGDevice's color table handle <BAL 26May89>
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MOVE.L GDITable(A2),-(SP) ; push theGDevice's current iTabHandle
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MOVE.W GDResPref(A2),-(SP) ; push the preferred iTableResolution
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_MakeITable ; make a new table
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TST.W QDErr ; was this sucessful?
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BEQ.S @noErr ; nope, so quit
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ADDQ #4,SP ; flush saved register
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BRA Done ;
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@noErr MOVE.L ([theGDevice]),A2 ; redereference in case it moved <BAL 31Mar89>
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MOVE.L ([GDITable,A2]),A0 ; get the iTable's master pointer
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@1
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ADD.w #ITTable,A0 ; point directly at data
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MOVE.L A0,stITabPtr(A6) ; save in stack frame
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SUB.w #ITTable,A0 ; get the iTable's master pointer
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MOVE.W ITabRes(A0),stITabRes(A6) ; get the iTable resolution
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MOVE.L ([GDPMap,A2]),A1 ; get pixMap's handle
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MOVE.L ([PMTable,A1]),stCLUTPtr(A6) ; get the device colorTable's ptr
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; MOVE.L gdSearchProc(A2),D0 ; get the search proc head
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; bne.s @search ; go use search routines
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; Here we know that the dst is indexed and no search proc is present,
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; so determine if the dst clut is all grays and/or we are dithering.
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; the iTable's master pointer is in A0
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MOVEQ #1,D0 ; prime the register again
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MOVE ITabRes(A0),D2 ; get the inverse table resolution (and Bit-field width)
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LSL.L D2,D0 ; calculate 2^^res
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LSL.L D2,D0 ; square it
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LSL.L D2,D0 ; cube it
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LEA ITTable(A0,D0.L),A1 ; point us at the ITabInfo
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tst.w iTabFlags(a1) ; is this a grayITab?
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bpl.s @chkDither ; no, go see if dithering
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add.w #ITabInfo,a1 ; point past header
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move.l a1,stITabInfo(a6) ; save for later
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addq #2,d5 ; remember to use gray routines
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moveq #40,d0
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cmp.l ITabSeed(a0),d0 ; is dst the standard 8-bit gray clut?
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beq.s DirectSrc ; yes, ignore dithering for speeed!
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@chkDither
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tst.b useDither(a6) ; should we dither?
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beq.s DirectSrc ; no, we're set
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addq #1,d5 ; remember to use dither routines
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;
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; Compute and allocate scanline buffer for dither error from previous scan <BAL 29Aug88>
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;
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MOVEQ #0,D0 ;CLEAR HIGH WORD OF D0
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MOVE NUMER+H(A6),D0 ;GET WIDTH OF DST
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lsl.l d4,d0 ;get bit width
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add.l #128,d0 ;round to double long boundary
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lsr.l d4,d0 ;get adjusted pixel width
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btst #1,d5 ;is dst a grayscale clut?
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bne.s @gray ;only need 2 bytes per pixel for gray error <BAL 18Mar89>
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move d0,d1 ;make a copy
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ADD D0,D0 ;6 bytes (R.w,G.w,B.w) per pixel
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add d1,d0 ;d0 is byte cnt/2 of ErrBuf
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@gray LSR #1,D0 ;AND DIV BY 2 FOR LONGS
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SUB.L D0,STACKFREE(A6) ;IS THERE ENOUGH STACK?
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bpl.s @stkOK2
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_stNoStack ;=>NOT ENOUGH STACK, QUIT
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@stkOK2
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CLR.L -(SP) ;CLEAR ANOTHER LONG OF SLOP
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@ClearB CLR.L -(SP) ;ALLOCATE AND CLEAR A LONG
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DBRA D0,@ClearB ;LOOP ENTIRE BUFFER
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MOVE.L SP,ErrBUF(A6) ;REMEMBER WHERE ErrBuf IS
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clr.b ErrDir(a6) ;init to carry error to right
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DirectSrc
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; We have the scaleCase routine selector in D5 so compute address
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; of routine and stuff it in scaleCase for later
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; D5 = zero[15-6] dstShift[5:3] src32[2] gray[1] dither[0]
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move.w d5,d0 ;copy selector
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lsr.w #3,d0 ;determine table to use
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lea (scDirTab1Ptr,ZA0,d0*4),A0 ;POINT TO MODE TABLE
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move.l (a0),a0 ;get table
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and.w #7,d5 ;get position in this table
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add.l 0(A0,D5*4),A0 ;GET CASE JUMP ADDRESS
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MOVE.L A0,scaleCase(A6) ; put depth scaling routine in stack frame
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BRA gotScaleCase ;=>ALREADY GOT ROUTINE
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;----------------------------------------------------------------
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;
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; The src is indexed data (1,2,4,8 bits/pixel).
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; If seeds don't match or depths are different then make a scale table.
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;
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; Compute D5 as index into Indexed mode table based on
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;
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; D5 = zero[15-5] dstShift[4:2] srcShift[1:0]
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;
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; D3=srcShift D4=dstShift
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;
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HasClut
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move.w d4,d5 ;prime mode table index with dstShift
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lsl.w #2,d5 ;make room for srcShift (0-3)
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or.w d3,d5 ;compose desired index
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DOXLATE MOVE SRCPIX+PIXELSIZE(A6),D1 ;GET SRC BITS PER PIXEL
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MOVEQ #1,D0 ;# ENTRIES = 2^ PIXELSIZE
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LSL D1,D0 ;CALC # ENTRIES
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SUB.L D0,STACKFREE(A6) ;IS THERE ENOUGH STACK?
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bpl.s @stkOK
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_stNoStack ;=>NOT ENOUGH STACK, QUIT
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@stkOK
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; IF THE DST IS AN OLD GRAFPORT AND IS ONE BIT PER PIXEL, THEN OVERRIDE THE
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; SEARCH PROC FOR PROPER MAPPING
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MOVEQ #0,D7 ;ASSUME NO PROC INSTALLED
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CMP #1,DSTPIX+PIXELSIZE(A6) ;ONE BIT PER PIXEL?
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BNE.S @PROCOK ;=>NO, PROC IS OK
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MOVE.L DSTBITS(A6),A1 ;GET DST BITMAP
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TST ROWBYTES(A1) ;IS IT OLD?
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BMI.S @PROCOK ;=>NO, PROC IS OK
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MOVEQ #1,D7 ;FLAG PROC INSTALLED
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PEA ONEBITPROC ;POINT TO OUR PROC
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_ADDSEARCH ;AND INSTALL IT
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@PROCOK MOVE.L SAVEA5(A6),A5 ;GET A5 FOR MAKESCALETBL
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MOVE.L A4,-(SP) ;PUSH SRCPIX POINTER
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move.w XlateFlag(a6),-(sp) ;pass translation flags <5JUNE92 SAH>
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_MakeScaleTbl ;AND MAKE PIXEL TRANSLATION TABLE
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ScaleColorBit EQU 3
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;------------------------------------------------------------------------------------------
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;
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; <C947> 08Nov87 BAL begins here:
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;
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;------------------------------------------------------------------------------------------
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;
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; MakeScaleTbl is called whenever the src and dst pixmaps have different
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; pixel depths or different color table seeds. MakeScaleTbl returns a
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; pixel translation table used to map each src pixel to a dst pixel.
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;
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; Here I check to see if the translation table returned by MakeScaleTbl is in
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; actuality an identity mapping--in which case no mapping at all is required!
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; In order for an identity mapping to result the src and dst pixMaps must be of the same
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; depth.
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;
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; If an identity mapping is detected, I must decide whether a stretch blit loop is
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; really required (ie src rect dst rect or maskBits nil) or whether a much faster
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; region blit or bit blit loop would suffice.
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;
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;------------------------------------------------------------------------------------------
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move SRCPIX+PIXELSIZE(A6),d1 ;get src bits/pixel
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cmp DSTPIX+PIXELSIZE(A6),d1 ;is it the same as dst bits/pixel?
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bne.s @ScaleOK ;no, have to do pixel scaling
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;inspect scale table for equality
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@chkTbl MOVEQ #1,D0 ;# ENTRIES = 2^ PIXELSIZE
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LSL D1,D0 ;CALC # ENTRIES in d0
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move d0,d1 ;make a copy of long count
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lsl #2,d1 ;get size of table
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subq #1,d0 ;make counter zero based for dbra
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move.l sp,a0 ;point to scale tbl
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add d1,a0 ;point past end of table
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@1 cmp.l -(a0),d0 ;compare with dst pixel value
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dbne d0,@1
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bne.s @ScaleOK ;tables are not equal so perform pixel scaling
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Bclr #ScaleColorBit,XlateFlag+1(a6) ; ¥¥¥ We are not scaling and it's an idendity map,
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; ¥¥¥ so set this bit for the callee
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;if we installed a proc get rid of it before short circuiting stretch
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TST D7 ;DID WE INSTALL A PROC
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BEQ.S @NOPRC ;=>NO, DON'T NEED TO REMOVE
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PEA ONEBITPROC ;ELSE PUSH OUR PROC
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_DELSEARCH ;AND DELETE IT
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@NOPRC LEA DSTPIX(A6),A5 ;RESTORE DSTPIX POINTER
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;----------------------------------------------------------------
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;
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; CALC NUMER AND DENOM BASED ON DSTRECT AND SRCRECT.
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; IF NUMER = DENOM AND SRC DEPTH = DST DEPTH THEN JUST CALL RGNBLT.
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;
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MOVE.L INVERTFLAG(A6),D7 ;restore invert flag <<C983>>
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moveq #0,d0 ;tell stretch we didn't really want it.
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bra GoBack ;jump back and decide between bitblt and rgnblt
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;don't really have to use stretch at all!
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;------------------------------------------------------------------------------------------
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;
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; <C947> 08Nov87 BAL ends here.
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;
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;------------------------------------------------------------------------------------------
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@ScaleOK
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MOVE.L SP,ScaleTbl(A6) ;SAVE POINTER TO TRANSLATION TABLE
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LEA DSTPIX(A6),A5 ;RESTORE DSTPIX POINTER
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TST D7 ;DID WE INSTALL A PROC
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BEQ.S IndexedSrc ;=>NO, DON'T NEED TO REMOVE
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PEA ONEBITPROC ;ELSE PUSH OUR PROC
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_DELSEARCH ;AND DELETE IT
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IndexedSrc
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;------------------------------------------------------------------------------------------
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; We have the scaleCase routine selector in D5 so compute address
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; of routine and stuff it in scaleCase for later
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;
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; D5 = zero[15-5] dstShift[4:2] srcShift[1:0]
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;
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move.w d5,d0 ;copy selector
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lsr.w #2,d0 ;determine table to use
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lea (scIndTab1Ptr,ZA0,d0*4),A0 ;POINT TO MODE TABLE
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move.l (a0),a0 ;get table
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and.w #3,d5 ;get position in this table
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add.l 0(A0,D5*4),A0 ;GET CASE JUMP ADDRESS
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MOVE.L A0,scaleCase(A6) ; put depth scaling routine in stack frame
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gotScaleCase
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;-----------------------------------------------------------------------
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;
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; We've got our ScaleCase.
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;
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;
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; ARE ALL THREE REGIONS RECTANGULAR ?
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;
|
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; If the visRgn or the clipRgn is non-rectangular then call TrimRect
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; to see if the intersection of the region and MinRect is rectangular,
|
||
; empty, or regional. <C951> 08Nov87 BAL
|
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;
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MOVEQ #10,D0 ;GET SIZE OF RECT RGN
|
||
MOVE.L RGNC(A6),A0 ;GET RGNHANDLE
|
||
MOVE.L (A0),A0 ;DE-REFERENCE IT
|
||
CMP RGNSIZE(A0),D0 ;IS RGNC RECTANGULAR ?
|
||
BEQ @chkVis ;=>yes, ignore it
|
||
|
||
MOVE.L RGNC(A6),-(SP) ;PUSH maskRgn HANDLE <C951>
|
||
PEA MINRECT(A6) ;PUSH ADDR OF MINRECT
|
||
MOVE.W #-1,-(SP) ;pass Trim = True
|
||
_TRIMRECT ;CALL TRIMRECT
|
||
BLT DONE ;=>INTERSECTION EMPTY, QUIT & SHOW CURSOR
|
||
BGT.S @chkVis ;=>non-rect
|
||
|
||
MOVE.L SAVEA5(A6),A1 ;Get global ptr <BAL 26Sep88>
|
||
MOVE.L GRAFGLOBALS(A1),A1 ;point to QD globals <BAL 26Sep88>
|
||
MOVE.L WIDEOPEN(A1),RGNC(A6) ;replace maskRgn with wideOpen <BAL 26Sep88>
|
||
|
||
|
||
@chkVis MOVE.L RGNB(A6),A0 ;GET RGNHANDLE
|
||
MOVE.L (A0),A0 ;DE-REFERENCE IT
|
||
CMP RGNSIZE(A0),D0 ;IS visRgn RECTANGULAR ? <C951>
|
||
BEQ.S @chkClip ;=>yes, go check clipRgn <C951>
|
||
|
||
MOVE.L RGNB(A6),-(SP) ;PUSH visRgn HANDLE <C951>
|
||
PEA MINRECT(A6) ;PUSH ADDR OF MINRECT
|
||
MOVE.W #-1,-(SP) ;pass Trim = True
|
||
_TRIMRECT ;CALL TRIMRECT
|
||
BLT DONE ;=>INTERSECTION EMPTY, QUIT & SHOW CURSOR
|
||
BGT @chkClip ;=>non-rect
|
||
|
||
MOVE.L SAVEA5(A6),A1 ;Get global ptr <BAL 26Sep88>
|
||
MOVE.L GRAFGLOBALS(A1),A1 ;point to QD globals <BAL 26Sep88>
|
||
MOVE.L WIDEOPEN(A1),RGNB(A6) ;replace visRgn with wideOpen <BAL 26Sep88>
|
||
|
||
@chkClip
|
||
MOVE.L RGNA(A6),A0 ;GET RGNHANDLE
|
||
MOVE.L (A0),A0 ;DE-REFERENCE IT
|
||
CMP RGNSIZE(A0),D0 ;IS clipRgn RECTANGULAR ?
|
||
BEQ.S @skipClip ;=>YES, ignore it
|
||
|
||
MOVE.L RGNA(A6),-(SP) ;PUSH clipRgn HANDLE <C951>
|
||
PEA MINRECT(A6) ;PUSH ADDR OF MINRECT <C951>
|
||
MOVE.W #-1,-(SP) ;pass Trim = True
|
||
_TRIMRECT ;CALL TRIMRECT <C951>
|
||
BLT DONE ;=>INTERSECTION EMPTY, QUIT & SHOW CURSOR
|
||
BGT.S @skipClip ;=>non-rect
|
||
|
||
MOVE.L SAVEA5(A6),A1 ;Get global ptr <BAL 26Sep88>
|
||
MOVE.L GRAFGLOBALS(A1),A1 ;point to QD globals <BAL 26Sep88>
|
||
MOVE.L WIDEOPEN(A1),RGNA(A6) ;replace clipRgn with wideOpen <BAL 26Sep88>
|
||
|
||
|
||
@skipClip
|
||
;_________________________________________________________________________________________
|
||
;
|
||
; Compute BUFSIZE = (# destination longs)-1
|
||
; Only need 1-Bit deep version since we are using run clipping only
|
||
;
|
||
|
||
MOVE MINRECT+LEFT(A6),D1 ;GET MINRECT LEFT
|
||
SUB BOUNDS+LEFT(A5),D1 ;CONVERT TO GLOBAL COORDS
|
||
EXT.L D1 ;CLEAR HI WORD
|
||
LSL.L D4,D1 ;CONVERT DST PIXELS TO BITS
|
||
AND #$FFE0,D1 ;TRUNC TO MULT OF 32
|
||
ASR.L D4,D1 ;CONVERT DST BITS TO PIXELS
|
||
ADD BOUNDS+LEFT(A5),D1 ;CONVERT BACK TO LOCAL
|
||
MOVE D1,BUFLEFT(A6) ;SAVE AS BUFLEFT
|
||
MOVEQ #0,D0 ;CLEAR HIGH WORD OF D0
|
||
MOVE MINRECT+RIGHT(A6),D0 ;GET MINRECT RIGHT
|
||
SUB D1,D0 ;CALC WIDTH IN DOTS
|
||
move.l d0,d1 ;save for expansion scanline buffer
|
||
|
||
lsl.l d4,d1 ;convert to bits at dest depth
|
||
subq.l #1,d1 ;force downward round
|
||
LSR.l #5,D1 ;GET NUMBER OF LONGS IN SCANBUF - 1
|
||
MOVE D1,BUFSIZE(A6) ;BUFSIZE = # LONGS -1 in destination
|
||
|
||
LSR.l #5,D0 ;GET NUMBER OF 1-bit mask LONGS
|
||
ADDQ.l #1,D0 ;MAKE IT ONE BASED
|
||
|
||
SUB.L D0,STACKFREE(A6) ;IS THERE ENOUGH STACK?
|
||
bpl.s @stkOK
|
||
_stNoStack ;=>NOT ENOUGH STACK, QUIT
|
||
@stkOK
|
||
|
||
;-----------------------------------------------------------------------
|
||
;
|
||
; ALLOCATE AND CLEAR A SCANLINE BUFFER FOR THE COMPOSITE MASK.
|
||
;
|
||
CLR.L -(SP) ;TWO FOR SLOP
|
||
CLR.L -(SP) ;ONE FOR SLOP
|
||
CLRMASK CLR.L -(SP) ;ALLOCATE AND CLEAR
|
||
DBRA D0,CLRMASK ;LOOP TILL DONE
|
||
MOVE.L SP,RGNBUFFER(A6) ;REMEMBER WHERE RGNBUFFER IS
|
||
|
||
|
||
;--------------------------------------------------------------------
|
||
;
|
||
; ALLOCATE BUFFERS AND INIT STATE RECORDS FOR EACH NON-RECT REGION
|
||
; GET SEEK ROUTINE INTO SEEKMASK(A6)
|
||
; GET EXPAND ROUTINE INTO EXRTN(A6) FOR SEEK ROUTINE
|
||
; Clobbers: A0-A3, D0-D4
|
||
;
|
||
; lea NoStack,a0 ;set up by stretch
|
||
; move.l a0,goShow(a6) ;pass to getSeek <BAL 21Mar89>
|
||
|
||
moveq #-1,d0
|
||
move.l d0,runBuf(a6) ;set non-zero for run clipping <1.5> BAL
|
||
MOVE.L RGNC(A6),-(SP) ;PUSH USER RGNHANDLE (never TrimRect'ed)
|
||
MOVE.L RGNB(A6),-(SP) ;PUSH VIS RGNHANDLE
|
||
MOVE.L RGNA(A6),-(SP) ;PUSH CLIP RGNHANDLE
|
||
MOVE.L #2,-(SP) ;PUSH HANDLE COUNT - 1
|
||
_GETSEEK ;GET EXPAND ROUTINE INTO EXRTN(A6)
|
||
;AND SEEK ROUTINE INTO SEEKMASK(A6)
|
||
|
||
tst.l errBuf(a6) ;are we dithering?
|
||
beq.s @noDither
|
||
_AllocRunBuf ;allocate a second run mask buffer
|
||
move.l a0,runBuf2(a6) ;save for dither routines
|
||
|
||
@noDither
|
||
;----------------------------------------------------------
|
||
;
|
||
; Jump into 32 bit addressing mode for blitting.
|
||
;
|
||
|
||
moveq #true32b,d0 ;switch to 32 bit addressing
|
||
_rSwapMMUMode ;get previous mode in d0.b (can trash a0/a1/a2, d0/d1/d2)
|
||
move.b d0,MMUsave(a6) ;save previous state for later
|
||
|
||
|
||
;------------------------------------------------
|
||
;
|
||
; SET UP SRCROW, SRCSCANS, SRCSHIFT, AND SRCADDR
|
||
;
|
||
MOVE SRCSHIFT(A6),D3 ;GET SRCSHIFT
|
||
MOVE.L srcRect(A6),A2 ;POINT TO srcRect
|
||
MOVE.L dstRect(A6),A3 ;POINT TO dstRect
|
||
MOVE.L SRCROW(A6),D2 ;GET SRC ROWBYTES
|
||
|
||
MOVE MINRECT+LEFT(A6),D1 ;GET MINRECT LEFT
|
||
SUB LEFT(A3),D1 ;SUBTRACT DSTRECT LEFT
|
||
ADD LEFT(A2),D1 ;ADD SRCRECT LEFT
|
||
SUB BOUNDS+LEFT+SrcPix(A6),D1 ;CONVERT TO SRC GLOBAL
|
||
EXT.L D1 ;MAKE LONG FOR BIG PIXELS
|
||
LSL.L D3,D1 ;CONVERT SRC PIXELS TO BITS
|
||
MOVEQ #$1F,D5 ;TREAT MOD 32 FOR SRCSHIFT
|
||
AND.L D1,D5 ;MAKE A COPY
|
||
MOVE.L D5,SRCALIGN(A6) ;SAVE ALIGNMENT OF SOURCE
|
||
|
||
MOVE MINRECT+TOP(A6),D0 ;GET MINRECT TOP
|
||
SUB TOP(A3),D0 ;SUBTRACT DSTRECT TOP
|
||
ADD TOP(A2),D0 ;ADD SRCRECT TOP
|
||
SUB BOUNDS+TOP+srcPix(A6),D0 ;CONVERT TO SRC GLOBAL
|
||
MULS D2,D0 ;MULT BY SRC ROWBYTES
|
||
ADD.L BASEADDR+srcPix(A6),D0 ;GET START OF SRC BITMAP
|
||
|
||
SUB.L D5,D1 ;ADJUST SRCLEFT FOR SRCSHIFT
|
||
ASR.L #3,D1 ;CONVERT BITS TO BYTES
|
||
ADD.L D1,D0 ;ADD BYTES TO SRCADDR
|
||
MOVE.L D0,SRCADDR(A6) ;SAVE AS SRCADDR
|
||
|
||
;----------------------------------------------------
|
||
;
|
||
; CALC STARTING DSTROW, DSTSHIFT, AND DSTADDR
|
||
;
|
||
MOVE DSTSHIFT(A6),D4 ;GET DST SHIFT
|
||
MOVE.L DSTROW(A6),D2 ;GET DST ROWBYTES
|
||
|
||
MOVE MINRECT+LEFT(A6),D1 ;GET DSTRECT LEFT
|
||
SUB BOUNDS+LEFT(A5),D1 ;CONVERT TO GLOBAL COORDS
|
||
EXT.L D1 ;MAKE LONG FOR BIG PIXELS
|
||
LSL.L D4,D1 ;CONVERT DST PIXELS TO BITS
|
||
MOVEQ #$1F,D6
|
||
AND.L D1,D6 ;TREAT MOD 32 FOR SHIFTCNT
|
||
NEG.L D6 ;AND NEGATE IT
|
||
MOVE.L D6,DSTALIGN(A6) ;SAVE FOR LATER
|
||
|
||
MOVE MINRECT+TOP(A6),D0 ;GET MINRECT TOP
|
||
MOVE D0,VERT(A6) ;INIT CURRENT VERTICAL
|
||
SUB BOUNDS+TOP(A5),D0 ;CONVERT TO GLOBAL COORDS
|
||
MULS D2,D0 ;MULT BY DST ROWBYTES BAL 02Dec88
|
||
ADD.L BASEADDR(A5),D0 ;GET START OF DST BITMAP
|
||
|
||
ASR.L #5,D1 ;CONVERT BITS TO LONGS
|
||
LSL.L #2,D1 ;AND BACK TO BYTES (MOD 4)
|
||
ADD.L D1,D0 ;ADD BYTES TO DSTADDR
|
||
MOVE.L D0,DSTADDR(A6) ;SAVE AS DSTADDR
|
||
|
||
|
||
;-------------------------------------------------------
|
||
;
|
||
; MAKE REGION BUFFER CURRENT FOR THIS VERTICAL.
|
||
; THEN SET UP AND DRAW CURRENT SCANLINE.
|
||
;
|
||
MOVE.L DSTADDR(A6),A5 ;INIT DSTPTR
|
||
MOVE.L SRCADDR(A6),A4 ;reload SRCPTR
|
||
move.w #4,RUNBUMP(a6) ;set transfer direction for seekmask
|
||
MOVE SRCPIX+PIXELSIZE(A6),D4 ;GET SOURCE PIXEL SIZE
|
||
MOVE DSTPIX+PIXELSIZE(A6),D5 ;GET DST PIXEL SIZE
|
||
|
||
NXTMASK
|
||
move MinRect+bottom(a6),d2 ;get bottom vertical position
|
||
sub vert(a6),d2 ;compute scans remaining, prime d2
|
||
ble.s Done
|
||
move d2,d3 ;save scans remaining
|
||
JSR ([SEEKMASK,A6]) ;MAKE MASK BUFFER CURRENT
|
||
move d2,d1 ;get scan count in d1
|
||
cmp d3,d1 ;scan count > scans remaining?
|
||
ble.s @go ;no, call the blit loop
|
||
move d3,d1 ;yes, pin to scans remaining
|
||
@go JSR ([RUNRTN,A6]) ;MAKE RUN BUFFER CURRENT
|
||
move.l scaleBltA3(a6),A3 ;reload A3 for scan loops
|
||
MOVE.L ScaleCase(A6),A2 ;GET MODE CASE JUMP
|
||
JMP (A2) ;TAKE MODE JUMP
|
||
|
||
|
||
|
||
;-----------------------------------------------------------------
|
||
;
|
||
; ENTIRE STRETCHBITS COMPLETE. RESTORE REGS AND STACK AND GO HOME.
|
||
;
|
||
Done MoveQ #1,d0 ;return success
|
||
GoBack MOVE.L SAVESTK2(A6),SP ;RESTORE STACK POINTER
|
||
RTS ;AND RETURN TO STRETCHBITS
|
||
|
||
|
||
;-----------------------------------------------------------------
|
||
;
|
||
; Scaling routines.
|
||
;
|
||
|
||
|
||
;-------------------------------------------------------
|
||
;
|
||
; scale and clip indexed source to 32-bit dst
|
||
; <SAH 060292>
|
||
; brought in Sean Callahan's new fast loop for 1
|
||
; to 32
|
||
;
|
||
;-------------------------------------------------------
|
||
; a0 = tmpsrc d0 = vert/scratch
|
||
; a1 = tmpmask d1 = scanCount
|
||
; a2 = tmpdst d2 = scratch
|
||
; a3 = scaleTbl d3 = run cnt
|
||
; a4 = srcPtr/patPtr d4 = src pixel size
|
||
; a5 = dstPtr d5 = scratch
|
||
; a6 = locals d6 = bit offset in src
|
||
; a7 = d7 = src shift
|
||
;-------------------------------------------------------
|
||
scNonBWto32
|
||
move srcShift(a6),d7 ;set this up once
|
||
move.l scaleTbl(a6),a3 ;set this up once
|
||
|
||
lea @first,a0 ;go here from now on
|
||
move.l A3,scaleBltA3(a6) ;save for reload after seekMask
|
||
move.l a0,ScaleCase(a6) ;remember for later
|
||
bra.s @first ;go to it
|
||
|
||
@nxtScan
|
||
add.l dstRow(a6),a5 ;BUMP DST TO NEXT ROW
|
||
add.l srcRow(a6),a4 ;BUMP src TO NEXT ROW
|
||
addq.w #1,vert(a6) ;BUMP DOWN A SCAN LINE
|
||
subq #1,d1
|
||
ble.s NXTMASK
|
||
|
||
@first move.l srcAlign(a6),d6 ;start with initial src offset
|
||
move.l a4,a0 ;init tmp src ptr
|
||
move.l a5,a2 ;init tmp dst ptr
|
||
move.l runBuf(a6),a1 ;point to run encoded mask buffer
|
||
|
||
@inst move.l (a1)+,d3 ;pick up next instruction long
|
||
bmi.s @nxtScan ;if high bit set then done with scan
|
||
add.w d3,a2 ;bump destptr by skip amount
|
||
lsr.w #2,d3 ;make byte skip into pixel skip
|
||
lsl.w d7,d3 ;make into bit skip
|
||
add.w d3,d6 ;bump src offset
|
||
move d6,d3 ;make a copy
|
||
lsr.w #5,d3 ;make into long cnt
|
||
lea (a0,d3.w*4),a0 ;bump src ptr
|
||
swap d3 ;get mask/blit cnt and check done flag
|
||
|
||
@blit MOVE.L (A0)+,D5 ;GET FIRST LONG OF SRC
|
||
@NXPXL BFEXTU D5{D6:D4},D0 ;GET A PIXEL OF SRC
|
||
move.l 0(A3,D0*4),(a2)+ ;TRANSLATE IT
|
||
ADD D4,D6 ;ADVANCE TO NEXT SRC PIXEL
|
||
AND #$1f,D6 ;TIME FOR NEXT SRC LONG?
|
||
DBEQ D3,@NXPXL ;LOOP ALL PIXELS THIS LONG
|
||
DBNE D3,@blit ;LOOP ALL PIXELS THIS RUN
|
||
beq.s @inst ;LOOP BACK FOR more runs
|
||
subq.w #4,a0 ;point back to remaining pixels
|
||
BRA.s @inst ;LOOP BACK FOR more runs
|
||
|
||
|
||
scIndexedto32
|
||
MOVE.L scaleTbl(A6),A3 ;set this up once
|
||
; btst #1,$17b
|
||
; bne.s scNonBWto32
|
||
CMP.W #1,D4 ;is src one bit?
|
||
BNE.S scNonBWto32
|
||
TST.L 4(A3) ;is second color black?
|
||
BNE.S scNonBWto32
|
||
MOVE.L #$00FFFFFF,D0
|
||
CMP.L (A3),D0 ;is first color white?
|
||
BNE.S scNonBWto32
|
||
|
||
MOVE.L D0,D4 ;move white mask to better register
|
||
LEA @first,A0 ;go here from now on
|
||
MOVE.L A0,ScaleCase(A6) ;remember for later
|
||
BRA.S @first ;go to it
|
||
|
||
|
||
@next ADD.L dstRow(A6),A5 ;BUMP DST TO NEXT ROW
|
||
ADD.L srcRow(A6),A4 ;BUMP src TO NEXT ROW
|
||
ADDQ.W #1,vert(A6) ;BUMP DOWN A SCAN LINE
|
||
SUBQ #1,D1
|
||
BLE.S NXTMASK
|
||
|
||
@first MOVE.L srcAlign(A6),D6 ;start with initial src offset
|
||
MOVE.L A4,A0 ;init tmp src ptr
|
||
MOVE.L A5,A2 ;init tmp dst ptr
|
||
MOVE.L runBuf(A6),A1 ;point to run encoded mask buffer
|
||
|
||
@inst MOVE.L (A1)+,D3 ;pick up next instruction long
|
||
BMI.S @next ;if high bit set then done with scan
|
||
ADD.W D3,A2 ;bump destptr by skip amount
|
||
LSR.W #2,D3 ;byte skip to pixel skip
|
||
ADD.W D6,D3 ;add current skip to bit skip
|
||
MOVEQ #$0F,D6 ;get mod 16 mask
|
||
AND.W D3,D6 ;get shift mod 16
|
||
LSR.W #4,D3 ;get short skip
|
||
ADD.W D3,A0 ;bump src
|
||
ADD.W D3,A0
|
||
SWAP D3 ;get mask/blit cnt and check done flag
|
||
|
||
@blit MOVEQ #$0F,D2
|
||
ADDQ.W #1,D3
|
||
AND.W D3,D2
|
||
LSR.W #4,D3
|
||
SUBQ.W #1,D3
|
||
BMI.S @no16
|
||
|
||
@reblit BFEXTS (A0){D6:16},D0
|
||
ADDQ.W #2,A0
|
||
BEQ.S @white
|
||
NOT.L D0
|
||
BEQ.S @black
|
||
|
||
MOVEQ #3,D5
|
||
@pixel ADD.W D0,D0
|
||
SUBX.L D7,D7
|
||
AND.L D4,D7
|
||
MOVE.L D7,(A2)+
|
||
ADD.W D0,D0
|
||
SUBX.L D7,D7
|
||
AND.L D4,D7
|
||
MOVE.L D7,(A2)+
|
||
ADD.W D0,D0
|
||
SUBX.L D7,D7
|
||
AND.L D4,D7
|
||
MOVE.L D7,(A2)+
|
||
ADD.W D0,D0
|
||
SUBX.L D7,D7
|
||
AND.L D4,D7
|
||
MOVE.L D7,(A2)+
|
||
DBRA D5,@pixel
|
||
DBRA D3,@reblit
|
||
SUBQ.W #1,D2
|
||
BMI.S @inst
|
||
BRA.S @last15
|
||
|
||
@white MOVE.L D4,D0
|
||
@black MOVE.L D0,(A2)+
|
||
MOVE.L D0,(A2)+
|
||
MOVE.L D0,(A2)+
|
||
MOVE.L D0,(A2)+
|
||
MOVE.L D0,(A2)+
|
||
MOVE.L D0,(A2)+
|
||
MOVE.L D0,(A2)+
|
||
MOVE.L D0,(A2)+
|
||
MOVE.L D0,(A2)+
|
||
MOVE.L D0,(A2)+
|
||
MOVE.L D0,(A2)+
|
||
MOVE.L D0,(A2)+
|
||
MOVE.L D0,(A2)+
|
||
MOVE.L D0,(A2)+
|
||
MOVE.L D0,(A2)+
|
||
MOVE.L D0,(A2)+
|
||
DBRA D3,@reblit
|
||
|
||
@no16 SUBQ.W #1,D2
|
||
BMI.S @inst
|
||
@last15 BFEXTS (A0){D6:16},D0
|
||
NOT.W D0
|
||
ADD.W D2,D6
|
||
ADDQ.W #1,D6
|
||
@sloop ADD.W D0,D0
|
||
SUBX.L D7,D7
|
||
AND.L D4,D7
|
||
MOVE.L D7,(A2)+
|
||
DBRA D2,@sloop
|
||
BRA.S @inst
|
||
|
||
|
||
|
||
;-------------------------------------------------------
|
||
;
|
||
; scale and clip 32-bit src to 8-bit color dst
|
||
;
|
||
;-------------------------------------------------------
|
||
; a0 = tmpsrc d0 = vert/scratch
|
||
; a1 = tmpmask d1 = scanCount/pixel cnt
|
||
; a2 = tmpdst d2 = scratch
|
||
; a3 = ITable d3 = run cnt
|
||
; a4 = srcPtr d4 = scratch
|
||
; a5 = dstPtr d5 = src pixel
|
||
; a6 = locals d6 = itabres
|
||
; a7 = d7 = 8-itabres
|
||
;-------------------------------------------------------
|
||
|
||
sc32to8
|
||
;One time initializations here
|
||
|
||
MOVE.W stITabRes(A6),d6 ; get the iTable resolution
|
||
moveq #8,d7 ; get cmpSize
|
||
sub.w d6,d7 ; get cmpSize-itabres
|
||
move.l dstAlign(a6),d0 ; -(# of dst bits to skip)
|
||
asr.l #1,d0 ; compute - (# of src bytes to back up)
|
||
add.l d0,a4 ; back off src ptr to beginning of dst long
|
||
MOVE.L stITabPtr(A6),A3 ; get ptr to ITable
|
||
|
||
lea @first,a0 ;go here from now on
|
||
move.l A3,scaleBltA3(a6) ;save for reload after seekMask
|
||
move.l a0,ScaleCase(a6) ;remember for later
|
||
bra.s @first ;go to it
|
||
|
||
@nxtScan
|
||
move.l dstRow(a6),d2 ;get dst rowbytes
|
||
add.l d2,a5 ;BUMP DST TO NEXT ROW
|
||
move.l srcRow(a6),d2 ;get src rowbytes
|
||
add.l d2,a4 ;BUMP src TO NEXT ROW
|
||
addq.w #1,vert(a6) ;BUMP DOWN A SCAN LINE
|
||
swap d1 ;get back scan count
|
||
subq #1,d1
|
||
ble.s NXTMASK
|
||
@first
|
||
move.l a4,a0 ;init tmp src ptr
|
||
move.l a5,a2 ;init tmp dst ptr
|
||
move.l runBuf(a6),a1 ;point to run encoded mask buffer
|
||
swap d1 ;save scan count in high byte
|
||
|
||
@inst move.w #3,d1 ;zero based dst pixels per source pixel
|
||
move.l (a1)+,d3 ;pick up next instruction long
|
||
bmi.s @nxtScan ;if high bit set then done with scan
|
||
add.w d3,a2 ;bump destptr by skip amount
|
||
lea (a0,d3.w*4),a0 ;make dst byte skip into src byte skip
|
||
swap d3 ;get mask/blit cnt and check done flag
|
||
bclr #runMaskBit-16,d3 ;check and clear mask flag
|
||
beq.s @blit ;no mask, so go fast
|
||
|
||
|
||
|
||
@mask MOVE.L (A0)+,D5 ;GET A LONG OF SRC
|
||
bra.s @first2 ;fill (cache) first
|
||
|
||
@nxtDs2 move.w #3,d1 ;dst pixels per source pixel (zero based)
|
||
@nxtSr2 MOVE.L (A0)+,D5 ;GET A LONG OF SRC
|
||
cmp.l d5,d4 ;same as last time (cache) ?
|
||
beq.s @again2 ;yes, use (cache)
|
||
|
||
@first2 moveq #0,d2 ;0,2,3 ;start fresh
|
||
move.w d5,d4 ;0,2,3 ;save blue/green for later
|
||
swap d5 ;1,4,4 ;get red in low byte
|
||
move.b d5,d2 ;0,2,3
|
||
lsl.l d6,d2 ;3,6,6 ;save itabres bits of red in high bytes
|
||
lsr.l #8,d4 ;1,4,4 ;chuck blue and get green cmp
|
||
move.b d4,d2 ;0,2,3 ;get green
|
||
lsl.l d6,d2 ;3,6,6 ;save itabres bits of green in high bytes
|
||
swap d5 ;1,4,4 ;get blue in low byte
|
||
move.b d5,d2 ;0,2,3 ;get blue
|
||
lsr.l d7,d2 ;3,6,6 ;shift back by cmpsize-itabres
|
||
;12,40,45
|
||
move.l d5,d4 ;save last src (for cache)
|
||
move.b 0(A3,D2),d2 ;get index in d2.b (for cache)
|
||
@again2 lsl.l #8,d0 ;shift other pixels up to make room
|
||
move.b d2,d0 ;add in this pixel
|
||
dbra d1,@nxtSr2 ;for each pixel in dst long
|
||
|
||
MOVE.L (A1)+,D5 ;GET MASK
|
||
AND.L D5,D0 ;MASK src DATA
|
||
NOT.L D5 ;MAKE NOTMASK
|
||
AND.L (A2),D5 ;GET DST DATA
|
||
OR.L D5,D0 ;MERGE WITH PAT DATA
|
||
MOVE.L D0,(A2)+ ;PUT RESULT TO DST
|
||
|
||
DBRA D3,@nxtDs2 ;LOOP ALL PIXELS THIS RUN
|
||
BRA.s @inst ;LOOP BACK FOR more runs
|
||
|
||
|
||
|
||
@blit MOVE.L (A0)+,D5 ;GET A LONG OF SRC
|
||
bra.s @first1 ;fill (cache) first
|
||
|
||
@nxtDst move.w #3,d1 ;dst pixels per source pixel (zero based)
|
||
@nxtSrc MOVE.L (A0)+,D5 ;GET A LONG OF SRC
|
||
cmp.l d5,d4 ;same as last time (cache) ?
|
||
beq.s @again ;yes, use (cache)
|
||
|
||
@first1 moveq #0,d2 ;0,2,3 ;start fresh
|
||
move.w d5,d4 ;0,2,3 ;save blue/green for later
|
||
swap d5 ;1,4,4 ;get red in low byte
|
||
move.b d5,d2 ;0,2,3
|
||
lsl.l d6,d2 ;3,6,6 ;save itabres bits of red in high bytes
|
||
lsr.l #8,d4 ;1,4,4 ;chuck blue and get green cmp
|
||
move.b d4,d2 ;0,2,3 ;get green
|
||
lsl.l d6,d2 ;3,6,6 ;save itabres bits of green in high bytes
|
||
swap d5 ;1,4,4 ;get blue in low byte
|
||
move.b d5,d2 ;0,2,3 ;get blue
|
||
lsr.l d7,d2 ;3,6,6 ;shift back by cmpsize-itabres
|
||
;12,40,45
|
||
move.l d5,d4 ;save last src (for cache)
|
||
move.b 0(A3,D2),d2 ;get index in d2.b (for cache)
|
||
@again lsl.l #8,d0 ;shift other pixels up to make room
|
||
move.b d2,d0 ;add in this pixel
|
||
dbra d1,@nxtSrc ;for each pixel in dst long
|
||
move.l d0,(a2)+ ;write out 4 pixels
|
||
|
||
DBRA D3,@nxtDst ;LOOP ALL PIXELS THIS RUN
|
||
BRA.s @inst ;LOOP BACK FOR more runs
|
||
|
||
|
||
|
||
;-------------------------------------------------------
|
||
;
|
||
; scale and clip 32-bit src to 8-bit gray dst
|
||
;
|
||
;-------------------------------------------------------
|
||
; a0 = tmpsrc d0 = vert/scratch
|
||
; a1 = tmpmask d1 = scanCount/pixel cnt
|
||
; a2 = tmpdst d2 = mapping cache
|
||
; a3 = luma table d3 = run cnt
|
||
; a4 = srcPtr d4 = green cmp (byte)
|
||
; a5 = dstPtr d5 = src RGB / luminance
|
||
; a6 = locals d6 = blue cmp (byte)
|
||
; a7 = d7 = red cmp (byte)
|
||
;-------------------------------------------------------
|
||
|
||
sc32to8gray
|
||
;One time initializations here
|
||
moveq #0,d4 ;clear out high end for luminance calculation
|
||
move.l d4,d6 ;clear out high end for luminance calculation
|
||
move.l d4,d7 ;clear out high end for luminance calculation
|
||
move.l dstAlign(a6),d0 ; -(# of dst bits to skip)
|
||
asr.l #1,d0 ; compute - (# of src bytes to back up)
|
||
add.l d0,a4 ; back off src ptr to beginning of dst long
|
||
MOVE.L stITabInfo(A6),A3 ;get pointer to the luminance table (past header)
|
||
|
||
lea @first,a0 ;go here from now on
|
||
move.l A3,scaleBltA3(a6) ;save for reload after seekMask
|
||
move.l a0,ScaleCase(a6) ;remember for later
|
||
bra.s @first ;go to it
|
||
|
||
@nxtScan
|
||
move.l dstRow(a6),d2 ;get dst rowbytes
|
||
add.l d2,a5 ;BUMP DST TO NEXT ROW
|
||
move.l srcRow(a6),d2 ;get src rowbytes
|
||
add.l d2,a4 ;BUMP src TO NEXT ROW
|
||
addq.w #1,vert(a6) ;BUMP DOWN A SCAN LINE
|
||
swap d1 ;get back scan count
|
||
subq #1,d1
|
||
ble.s NXTMASK
|
||
@first
|
||
move.l a4,a0 ;init tmp src ptr
|
||
move.l a5,a2 ;init tmp dst ptr
|
||
move.l runBuf(a6),a1 ;point to run encoded mask buffer
|
||
swap d1 ;save scan count in high byte
|
||
|
||
@inst move.w #3,d1 ;zero based dst pixels per source pixel
|
||
move.l (a1)+,d3 ;pick up next instruction long
|
||
bmi.s @nxtScan ;if high bit set then done with scan
|
||
add.w d3,a2 ;bump destptr by skip amount
|
||
lsl.w #2,d3 ;make dst byte skip src byte skip
|
||
add.w d3,a0 ;bump src ptr
|
||
swap d3 ;get mask/blit cnt and check done flag
|
||
bclr #runMaskBit-16,d3 ;check and clear mask flag
|
||
beq.s @blit ;no mask, so go fast
|
||
|
||
|
||
|
||
@mask MOVE.L (A0)+,D5 ;GET A LONG OF SRC
|
||
bra.s @first2 ;fill (cache) first
|
||
|
||
@nxtDs2 move.w #3,d1 ;dst pixels per source pixel (zero based)
|
||
@nxtSr2 MOVE.L (A0)+,D5 ;GET A LONG OF SRC
|
||
cmp.l d5,d2 ;same as last time (cache) ?
|
||
beq.s @again2 ;yes, use (cache)
|
||
|
||
@first2
|
||
move.l d5,d2 ; copy last src long for (cache)
|
||
move.b d5,d6 ; get the blue component
|
||
lsr.l #8,d5 ; get red,green in low word
|
||
move.b d5,d4 ; get the green component
|
||
lsr.w #8,d5 ; get red in low byte
|
||
move.b d5,d7 ; get the red component
|
||
|
||
; Compute Luminance = ((((((r+g)/2)+b)/2+r)/2)+g)/2
|
||
|
||
add.w d4,d5
|
||
add.w d6,d5
|
||
add.w d6,d5
|
||
lsr.w #2,d5
|
||
add.w d7,d5
|
||
add.w d4,d5
|
||
add.w d4,d5
|
||
lsr.w #2,d5
|
||
move.b (a3,d5),d7 ; pick up index for this luminance (cache)
|
||
|
||
@again2 lsl.l #8,d0 ;shift other pixels up to make room
|
||
move.b d7,d0 ;add in this pixel
|
||
dbra d1,@nxtSr2 ;for each pixel in dst long
|
||
|
||
MOVE.L (A1)+,D5 ;GET MASK
|
||
AND.L D5,D0 ;MASK src DATA
|
||
NOT.L D5 ;MAKE NOTMASK
|
||
AND.L (A2),D5 ;GET DST DATA
|
||
OR.L D5,D0 ;MERGE WITH PAT DATA
|
||
MOVE.L D0,(A2)+ ;PUT RESULT TO DST
|
||
|
||
DBRA D3,@nxtDs2 ;LOOP ALL PIXELS THIS RUN
|
||
BRA.s @inst ;LOOP BACK FOR more runs
|
||
|
||
|
||
|
||
@blit MOVE.L (A0)+,D5 ;GET A LONG OF SRC
|
||
bra.s @first1 ;fill (cache) first
|
||
|
||
@nxtDst move.w #3,d1 ;dst pixels per source pixel (zero based)
|
||
@nxtSrc MOVE.L (A0)+,D5 ;GET A LONG OF SRC
|
||
cmp.l d5,d2 ;same as last time (cache) ?
|
||
beq.s @again ;yes, use (cache)
|
||
|
||
@first1
|
||
move.l d5,d2 ; copy last src long for (cache)
|
||
move.b d5,d6 ; get the blue component
|
||
lsr.l #8,d5 ; get red,green in low word
|
||
move.b d5,d4 ; get the green component
|
||
lsr.w #8,d5 ; get red in low byte
|
||
move.b d5,d7 ; get the red component
|
||
|
||
; Compute Luminance = ((((((r+g)/2)+b)/2+r)/2)+g)/2
|
||
|
||
add.w d4,d5
|
||
add.w d6,d5
|
||
add.w d6,d5
|
||
lsr.w #2,d5
|
||
add.w d7,d5
|
||
add.w d4,d5
|
||
add.w d4,d5
|
||
lsr.w #2,d5
|
||
move.b (a3,d5),d7 ; pick up index for this luminance (cache)
|
||
|
||
@again lsl.l #8,d0 ;shift other pixels up to make room
|
||
move.b d7,d0 ;add in this pixel
|
||
dbra d1,@nxtSrc ;for each pixel in dst long
|
||
move.l d0,(a2)+ ;write out 4 pixels
|
||
|
||
DBRA D3,@nxtDst ;LOOP ALL PIXELS THIS RUN
|
||
BRA.s @inst ;LOOP BACK FOR more runs
|
||
|
||
|
||
;-------------------------------------------------------
|
||
;
|
||
; seek loop for serpentine dithering with run masks
|
||
;
|
||
;-------------------------------------------------------
|
||
|
||
; from QDciPatchROM.a, although some old code appears to have been left <sm 6/9/92>stb
|
||
; in the false portion of an ifÉelseÉendif. <sm 6/9/92>stb
|
||
|
||
NXTMASKDither
|
||
move MinRect+bottom(a6),d2 ;get bottom vertical position
|
||
sub vert(a6),d2 ;compute scans remaining, prime d2
|
||
ble Done
|
||
move d2,d3 ;save scans remaining
|
||
JSR ([SEEKMASK,A6]) ;MAKE MASK BUFFER CURRENT
|
||
move d2,d1 ;get scan count in d1
|
||
cmp d3,d1 ;scan count > scans remaining?
|
||
ble.s @go ;no, call the blit loop
|
||
move d3,d1 ;yes, pin to scans remaining
|
||
@go
|
||
move.l runBuf(a6),d3 ;save original
|
||
move.w #-4,RUNBUMP(a6) ;set transfer direction for seekmask
|
||
move.l runBuf2(a6),runBuf(a6) ;point at alternate
|
||
JSR ([RUNRTN,A6]) ;MAKE BAKWRDS RUN BUFFER CURRENT
|
||
move.l d3,runBuf(a6) ;restore original
|
||
move.w #4,RUNBUMP(a6) ;set transfer direction for seekmask
|
||
JSR ([RUNRTN,A6]) ;MAKE FORWRDS RUN BUFFER CURRENT
|
||
move.l scaleBltA3(a6),A3 ;reload A3 for scan loops
|
||
MOVE.L ScaleCase(A6),A2 ;GET MODE CASE JUMP
|
||
JMP (A2) ;TAKE MODE JUMP
|
||
|
||
;-------------------------------------------------------
|
||
;
|
||
; scale, dither and clip 32-bit src to 8-bit dst
|
||
;
|
||
;-------------------------------------------------------
|
||
; a0 = tmpsrc d0 = src RGB pixel
|
||
; a1 = tmpmask d1 = pixel cnt/scratch
|
||
; a2 = tmpdst d2 = output pixels
|
||
; a3 = ITable d3 = run cnt
|
||
; a4 = errBuffer d4 = scratch
|
||
; a5 = CLUT d5 = red error
|
||
; a6 = locals d6 = grn error
|
||
; a7^= scancount d7 = blu error (itabres)
|
||
;-------------------------------------------------------
|
||
|
||
sc32to8Dither
|
||
;One time initializations here
|
||
|
||
subq #4,sp ;space for scancount
|
||
move.l dstAlign(a6),d0 ; -(# of dst bits to skip)
|
||
asr.l #1,d0 ; compute - (# of src bytes to back up)
|
||
add.l d0,a4 ; back off src ptr to beginning of dst long
|
||
move.l a4,srcAddr(a6) ; save for later
|
||
MOVE.L stITabPtr(A6),A3 ; get ptr to ITable
|
||
MOVE.L stCLUTPtr(A6),A5 ; get ptr to CLUT
|
||
moveq #0,d4 ; clear out high word always
|
||
|
||
lea @first,a0 ;go here from now on
|
||
move.l A3,scaleBltA3(a6) ;save for reload after seekMask
|
||
move.l a0,ScaleCase(a6) ;remember for later
|
||
bra.s NXTMASKDither ;go to it
|
||
|
||
align 16
|
||
|
||
@nxtScan
|
||
move.l dstRow(a6),d2 ;get dst rowbytes
|
||
add.l d2,dstAddr(a6) ;BUMP DST TO NEXT ROW
|
||
move.l srcRow(a6),d2 ;get src rowbytes
|
||
add.l d2,srcAddr(a6) ;BUMP src TO NEXT ROW
|
||
addq.w #1,vert(a6) ;BUMP DOWN A SCAN LINE
|
||
subq #1,(sp) ;decrement scan count
|
||
move (sp),d1 ;get back scan count
|
||
ble.s NXTMASKDither
|
||
@first
|
||
move.l srcAddr(a6),a0 ;init tmp src ptr
|
||
move.l dstAddr(a6),a2 ;init tmp dst ptr
|
||
move.l runBuf(a6),a1 ;point to run encoded mask buffer
|
||
move d1,(sp) ;save scan count on stack
|
||
MOVE.L ErrBuf(a6),A4 ;get ptr to ErrBuf
|
||
MOVEQ #0,D5 ;init redAccum
|
||
MOVE.L D5,D6 ;init grnAccum
|
||
MOVE.L D5,D7 ;init bluAccum
|
||
MOVE.W stITabRes(A6),d7 ;get the iTable resolution
|
||
swap d7 ;keep in high word
|
||
not.b errDir(a6) ;check and toggle diffusion direction
|
||
bne.s @inst ;all ok if going left to right
|
||
|
||
move.l runBuf2(a6),a1 ;get right to left run buffer
|
||
|
||
@inst move.l (a1)+,d3 ;pick up next instruction long
|
||
bmi.s @nxtScan ;if high bit set then done with scan
|
||
add.w d3,a2 ;bump destptr by skip amount
|
||
add.w d3,d3 ;bump errbuf by 1x
|
||
add.w d3,a4 ;bump errbuf by 2x
|
||
add.w d3,d3 ;make dst byte skip src byte skip
|
||
add.w d3,a0 ;bump src ptr by 4x
|
||
add.w d3,a4 ;bump errbuf by 6x
|
||
swap d3 ;get mask/blit
|
||
lsl.l #32-runMaskBit,d3 ;shift mask flag into high word
|
||
lsr.w #32-runMaskBit,d3 ;clear flags from low word
|
||
tst.b errDir(a6) ;check diffusion direction
|
||
bne.s @forward ;src is OK for forward travel
|
||
|
||
|
||
@backward
|
||
bsr.s ditherCore8
|
||
|
||
sub.w #48,a4 ;bump back by 4+4 error pixels
|
||
sub.w #32,a0 ;bump back by 4+4 src pixels
|
||
|
||
btst #16,d3 ;check mask flag
|
||
beq.s @bblit ;no mask
|
||
|
||
MOVE.L (A1)+,D0 ;GET MASK
|
||
AND.L D0,D2 ;MASK src DATA
|
||
NOT.L D0 ;MAKE NOTMASK
|
||
AND.L (A2),D0 ;GET DST DATA
|
||
OR.L D0,D2 ;MERGE WITH PAT DATA
|
||
@bblit MOVE.L D2,(A2) ;PUT RESULT TO DST
|
||
subq #4,a2 ;bump the dst
|
||
DBRA D3,@backward ;LOOP ALL PIXELS THIS RUN
|
||
BRA.s @inst ;LOOP BACK FOR more runs
|
||
|
||
|
||
@forward
|
||
bsr.s ditherCore8
|
||
|
||
btst #16,d3 ;check mask flag
|
||
beq.s @fblit ;no mask
|
||
|
||
MOVE.L (A1)+,D0 ;GET MASK
|
||
AND.L D0,D2 ;MASK src DATA
|
||
NOT.L D0 ;MAKE NOTMASK
|
||
AND.L (A2),D0 ;GET DST DATA
|
||
OR.L D0,D2 ;MERGE WITH PAT DATA
|
||
@fblit MOVE.L D2,(A2)+ ;PUT RESULT TO DST
|
||
DBRA D3,@forward ;LOOP ALL PIXELS THIS RUN
|
||
BRA.s @inst ;LOOP BACK FOR more runs
|
||
|
||
|
||
if 1 then
|
||
|
||
DitherCore8
|
||
moveq #3,d1 ;4 per dst long; clear high 3 bytes
|
||
@nxtSrc
|
||
swap d1 ;save pixel cnt in high word
|
||
move.l (a0)+,d0 ;fetch next src pixel
|
||
|
||
move.b d0,d4 ;get blue as a word
|
||
add.w 4(a4),D7 ;consume blu error from above
|
||
add.w d4,d7 ;accumulate blue
|
||
spl d4 ;get pin value if neg
|
||
cmp.w d4,d7 ;is it too big
|
||
sgt d1 ;get pin value if too big
|
||
and d4,d7 ;mask to zero or a byte
|
||
or d1,d7 ;conditionally pin to ff
|
||
lsr.w #8,d0 ;toss blue
|
||
|
||
add.w 2(a4),D6 ;consume grn error from above
|
||
add.w d0,d6 ;accumulate green
|
||
spl d4 ;get pin value if neg
|
||
cmp.w d4,d6 ;is it too big
|
||
sgt d1 ;get pin value if too big
|
||
and d4,d6 ;mask to zero or a byte
|
||
or d1,d6 ;conditionally pin to ff
|
||
swap d0 ;toss green
|
||
|
||
move.b d0,d4 ;get red as a word
|
||
add.w (a4),D5 ;consume red error from above
|
||
add.w d4,d5 ;accumulate red
|
||
spl d4 ;get pin value if neg
|
||
cmp.w d4,d5 ;is it too big
|
||
sgt d1 ;get pin value if too big
|
||
and d4,d5 ;mask to zero or a byte
|
||
or d1,d5 ;conditionally pin to ff
|
||
|
||
move.l d7,d0 ;get the iTable resolution in high word
|
||
swap d0 ;move it to low word
|
||
move.b d5,d4 ;get desired red value
|
||
lsl.l d0,d4 ;move it up
|
||
move.b d6,d4 ;get desired grn value
|
||
lsl.l d0,d4 ;move it up
|
||
move.b d7,d4 ;get desired blu value
|
||
neg d0
|
||
addq #8,d0
|
||
lsr.l d0,d4 ;throw out the insignificant bits
|
||
|
||
move.b (a3,d4.L),d1 ;get the index in D1.w (hi byte still clear)
|
||
lsl.l #8,d2 ;shift other pixels up to make room
|
||
move.b d1,d2 ;save this pixel
|
||
move.l CTTable+rgb+red(a5,d1.w*8),d0 ;get RRRRGGGG
|
||
|
||
moveq #0,d4 ;clear out high end
|
||
lsr.l #8,d0 ;get high byte of green
|
||
move.b d0,d4 ;make it a word
|
||
sub.w d4,d6 ;compute green error
|
||
|
||
swap d0 ;get high byte of red
|
||
sub.w d0,d5 ;compute red error
|
||
|
||
move.b CTTable+rgb+blue(a5,d1.w*8),d4 ;get BBBB
|
||
sub.w d4,d7 ;compute blue error
|
||
|
||
MOVEQ #0,D4 ;GET A HANDY KONSTANT
|
||
asr.w #1,d5 ;get half red error
|
||
move.w d5,(a4)+ ;save 1/2 for next scanline and carry 1/2 to right
|
||
ADDX.W D4,D5 ;KEEP NEGATIVE NUMBERS FROM DRIFTING AWAY FROM ZERO
|
||
asr.w #1,d6 ;get half grn error
|
||
move.w d6,(a4)+ ;save 1/2 for next scanline and carry 1/2 to right
|
||
ADDX.W D4,D6 ;KEEP NEGATIVE NUMBERS FROM DRIFTING AWAY FROM ZERO
|
||
asr.w #1,d7 ;get half blu error
|
||
move.w d7,(a4)+ ;save 1/2 for next scanline and carry 1/2 to right
|
||
ADDX.W D4,D7 ;KEEP NEGATIVE NUMBERS FROM DRIFTING AWAY FROM ZERO
|
||
|
||
swap d1 ;get back pixel cnt
|
||
dbra d1,@nxtSrc ;do for each src pixel in this dst long
|
||
rts
|
||
|
||
else
|
||
|
||
DitherCore8
|
||
moveq #3,d1 ;4 per dst long; clear high 3 bytes
|
||
@nxtSrc
|
||
swap d1 ;save pixel cnt in high word
|
||
move.l (a0)+,d0 ;fetch next src pixel
|
||
moveq #0,d4 ;clear out temp
|
||
|
||
move.b d0,d4 ;get blue as a word
|
||
add.w 4(a4),D7 ;consume blu error from above
|
||
add.w d4,d7 ;accumulate blue
|
||
spl d4 ;get pin value if neg
|
||
cmp.w #$ff,d7 ;is it too big
|
||
sgt d1 ;get pin value if too big
|
||
and d4,d7 ;mask to zero or a byte
|
||
or d1,d7 ;conditionally pin to ff
|
||
lsr.l #8,d0 ;toss blue
|
||
|
||
move.b d0,d4 ;get green as a word
|
||
add.w 2(a4),D6 ;consume grn error from above
|
||
add.w d4,d6 ;accumulate green
|
||
spl d4 ;get pin value if neg
|
||
cmp.w #$ff,d6 ;is it too big
|
||
sgt d1 ;get pin value if too big
|
||
and d4,d6 ;mask to zero or a byte
|
||
or d1,d6 ;conditionally pin to ff
|
||
lsr.l #8,d0 ;toss green
|
||
|
||
move.b d0,d4 ;get red as a word
|
||
add.w (a4),D5 ;consume red error from above
|
||
add.w d4,d5 ;accumulate red
|
||
spl d4 ;get pin value if neg
|
||
cmp.w #$ff,d5 ;is it too big
|
||
sgt d1 ;get pin value if too big
|
||
and d4,d5 ;mask to zero or a byte
|
||
or d1,d5 ;conditionally pin to ff
|
||
|
||
; move.w stITabRes(A6),D0 ;get the iTable resolution
|
||
move.b d5,d4 ;get desired red value
|
||
lsl.l #4,d4 ;move it up
|
||
move.b d6,d4 ;get desired grn value
|
||
lsl.l #4,d4 ;move it up
|
||
move.b d7,d4 ;get desired blu value
|
||
; neg d0
|
||
; addq #8,d0
|
||
lsr.l #4,d4 ;throw out the insignificant bits
|
||
|
||
move.b (a3,d4.L),d1 ;get the index in D1.w (hi byte still clear)
|
||
lsl.l #8,d2 ;shift other pixels up to make room
|
||
move.b d1,d2 ;save this pixel
|
||
move.l CTTable+rgb+red(a5,d1.w*8),d0 ;get RRRRGGGG
|
||
|
||
moveq #0,d4 ;clear out high end
|
||
lsr.l #8,d0 ;get high byte of green
|
||
move.b d0,d4 ;make it a word
|
||
sub.w d4,d6 ;compute green error
|
||
|
||
swap d0 ;get high byte of red
|
||
move.b d0,d4 ;make it a word
|
||
sub.w d4,d5 ;compute red error
|
||
|
||
move.w CTTable+rgb+blue(a5,d1.w*8),d0 ;get BBBB
|
||
lsr.w #8,d0 ;get high byte of blue
|
||
move.b d0,d4 ;make it a word
|
||
sub.w d4,d7 ;compute blue error
|
||
|
||
asr.w #1,d5 ;get half red error
|
||
move.w d5,(a4)+ ;save 1/2 for next scanline and carry 1/2 to right
|
||
asr.w #1,d6 ;get half grn error
|
||
move.w d6,(a4)+ ;save 1/2 for next scanline and carry 1/2 to right
|
||
asr.w #1,d7 ;get half blu error
|
||
move.w d7,(a4)+ ;save 1/2 for next scanline and carry 1/2 to right
|
||
|
||
swap d1 ;get back pixel cnt
|
||
dbra d1,@nxtSrc ;do for each src pixel in this dst long
|
||
rts
|
||
|
||
endif
|
||
|
||
|
||
;-------------------------------------------------------
|
||
;
|
||
; <14SEP90 SMC>
|
||
; scale and clip 1-bit color src to 2-bit color dst
|
||
;
|
||
; Some optimizations have been commented out to save a very
|
||
; small amount of space. This case will rarely be called
|
||
; and isn't worth much code space.
|
||
;
|
||
;-------------------------------------------------------
|
||
; a0 = temp srcPtr d0 = scratch
|
||
; a1 = temp mskPtr d1 = scanCount/
|
||
; a2 = temp dstPtr d2 =
|
||
; a3 = scale table d3 = run count
|
||
; a4 = srcPtr d4 = scratch
|
||
; a5 = dstPtr d5 = source data
|
||
; a6 = locals d6 = shift
|
||
; a7 = d7 = #$FFFFFFFF
|
||
;-------------------------------------------------------
|
||
|
||
scInd1ToInd2 ;One time initializations here
|
||
|
||
;if colorizing, go to loop that can handle it <5JUNE92 SAH>
|
||
btst #ScaleColorBit,XlateFlag+1(a6) ; <5JUNE92 SAH>
|
||
bne scIndToInd ;go to a colorizing loop <5JUNE92 SAH>
|
||
|
||
MOVE.L dstAlign(A6),D6 ;get dst alignment
|
||
ASR.L #1,D6 ;convert it to src bits
|
||
ADD.L srcAlign(A6),D6 ;and add src alignment
|
||
MOVEQ #0,D4 ;clear out high 3 bytes
|
||
; MOVEQ #-1,D7 ;set comparison register to -1
|
||
LEA Table2,A3 ;get scaling table
|
||
MOVE.L A3,scaleBltA3(A6) ;save for reload after seekMask
|
||
LEA @first,A0 ;go there from now on
|
||
MOVE.L A0,ScaleCase(A6) ;remember for later
|
||
JMP (A0) ;go to it
|
||
|
||
ALIGN Alignment
|
||
|
||
@nxtScan
|
||
ADD.L dstRow(A6),A5 ;bump dstptr to next row
|
||
ADD.L srcRow(A6),A4 ;bump srcptr to next row
|
||
ADDQ.W #1,vert(A6) ;bump down a scan line
|
||
SUBQ #1,D1 ;dec scan count
|
||
BLE.S NXTMASK ;get next set of runs
|
||
|
||
@first MOVE.L A4,A0 ;init temp srcptr
|
||
MOVE.L runBuf(A6),A1 ;point to run encoded mask buffer
|
||
MOVE.L A5,A2 ;init temp dstptr
|
||
|
||
@inst MOVE.L (A1)+,D3 ;pick up next instruction long
|
||
BMI.S @nxtScan ;if high bit set then done with scan
|
||
ADD.W D3,A2 ;bump dstptr by skip amount
|
||
LSR.W #1,D3 ;bump srcptr by half skip amount
|
||
ADD.W D3,A0
|
||
SWAP D3 ;get mask/blit cnt and check done flag
|
||
BCLR #runMaskBit-16,d3 ;check and clear mask flag
|
||
BEQ.S @blit ;no mask, so go fast
|
||
|
||
@mask BFEXTS (A0){D6:16},D5 ;get word of src
|
||
ADDQ #2,A0 ;bump srcptr to next word
|
||
BEQ.S @mwhite ;special case source of all zeroes
|
||
; CMP D5,D7 ;is source all ones?
|
||
; BEQ.S @mblack ; yes, go handle in special case
|
||
@mmixed MOVE.B D5,D4 ;get low byte of src word
|
||
LSR #8,D5 ;get high byte of src word
|
||
MOVE.W 0(A3,D5.W*2),D5 ;expand src high byte
|
||
SWAP D5 ;put result high word
|
||
MOVE.W 0(A3,D4.W*2),D5 ;expand src low byte into low word
|
||
@mwhite MOVE.L (A2),D0 ;get the dest
|
||
EOR.L D0,D5
|
||
AND.L (A1)+,D5 ;splice them together with mask
|
||
EOR.L D0,D5
|
||
MOVE.L D5,(A2)+ ;plot resulting long
|
||
DBRA D3,@mask ;continue run
|
||
BRA.S @inst ;get next run
|
||
|
||
;@mblack MOVE.L (A1)+,D5 ;OR long of mask to dest since
|
||
; OR.L D5,(A2)+ ; source is all ones
|
||
; DBRA D3,@mask
|
||
; BRA.S @inst ;get next run
|
||
|
||
;@mwhite MOVE.L (A1)+,D5 ;BIC long of mask to dest since
|
||
; NOT.L D5 ; source is all zeroes
|
||
; AND.L D5,(A2)+
|
||
; DBRA D3,@mask
|
||
; BRA.S @inst ;get next run
|
||
|
||
@blit BFEXTS (A0){D6:16},D5 ;get word of src and sign extend
|
||
ADDQ #2,A0 ;bump srcptr to next word
|
||
BEQ.S @same ;if all white, write extended long directly
|
||
; CMP D5,D7 ;is source all ones?
|
||
; BEQ.S @same ; yes, write extended long directly
|
||
@mixed MOVE.B D5,D4 ;get low byte of src word
|
||
LSR #8,D5 ;get high byte of src word
|
||
MOVE.W 0(A3,D5.W*2),D5 ;expand src high byte
|
||
SWAP D5 ;put result high word
|
||
MOVE.W 0(A3,D4.W*2),D5 ;expand src low byte into low word
|
||
@same MOVE.L D5,(A2)+ ;move result to dest
|
||
DBRA D3,@blit ;continue run
|
||
BRA.S @inst ;get next run
|
||
|
||
|
||
;-------------------------------------------------------
|
||
;
|
||
; <14SEP90 SMC>
|
||
; scale and clip 1-bit color src to 4-bit color dst
|
||
;
|
||
;-------------------------------------------------------
|
||
; a0 = temp srcPtr d0 = scratch
|
||
; a1 = temp mskPtr d1 = scanCount/scratch
|
||
; a2 = temp dstPtr d2 = scratch
|
||
; a3 = scale table d3 = run count
|
||
; a4 = srcPtr d4 = part count
|
||
; a5 = dstPtr d5 = source data
|
||
; a6 = locals d6 = shift
|
||
; a7 = d7 = #$FFFFFFFF
|
||
;-------------------------------------------------------
|
||
|
||
scInd1ToInd4 ;One time initializations here
|
||
|
||
;if colorizing, go to loop that can handle it <5JUNE92 SAH>
|
||
btst #ScaleColorBit,XlateFlag+1(a6) ; <5JUNE92 SAH>
|
||
bne scIndToInd ;go to a colorizing loop <5JUNE92 SAH>
|
||
|
||
MOVE.L dstAlign(A6),D6 ;get dst alignment
|
||
ASR.L #2,D6 ;convert it to bytes
|
||
ADD.L srcAlign(A6),D6 ;and add src alignment
|
||
MOVEQ #-1,D7 ;set comparison register to -1
|
||
LEA Table4,A3 ;get scaling table
|
||
MOVE.L A3,scaleBltA3(A6) ;save for reload after seekMask
|
||
LEA @first,A0 ;go there from now on
|
||
MOVE.L A0,ScaleCase(A6) ;remember for later
|
||
JMP (A0) ;go to it
|
||
|
||
ALIGN Alignment
|
||
|
||
@nxtScan
|
||
ADD.L dstRow(A6),A5 ;bump dstptr to next row
|
||
ADD.L srcRow(A6),A4 ;bump srcptr to next row
|
||
ADDQ.W #1,vert(A6) ;bump down a scan line
|
||
SWAP D1 ;get scan count in low word
|
||
SUBQ #1,D1 ;dec scan count
|
||
BLE.S NXTMASK ;get next set of runs
|
||
|
||
@first MOVE.L A4,A0 ;init tmp src ptr
|
||
MOVE.L runBuf(A6),A1 ;point to run encoded mask buffer
|
||
MOVE.L A5,A2 ;init tmp dst ptr
|
||
SWAP D1 ;put scan count in high word
|
||
CLR.W D1 ;clear low word
|
||
|
||
@inst MOVE.L (A1)+,D3 ;pick up next instruction long
|
||
BMI.S @nxtScan ;if high bit set then done with scan
|
||
ADD.W D3,A2 ;bump dstptr by skip amount
|
||
LSR.W #2,D3 ;bump srcptr by 1/4 skip amount
|
||
ADD.W D3,A0
|
||
SWAP D3 ;get mask/blit cnt and check done flag
|
||
BCLR #runMaskBit-16,d3 ;check and clear mask flag
|
||
BEQ.S @blit ;no mask, so go fast
|
||
BRA.S @mask ;start masking run
|
||
|
||
@mnext SUBQ #4,D3 ;4 longs of the run have been done
|
||
BMI.S @inst ;if run is complete, get another
|
||
@mask CMP #3,D3 ;can we do at least 4 longs of dst?
|
||
BLT.S @mnextPartial ; no, go do partial
|
||
|
||
BFEXTU (A0){D6:0},D5 ;get long of src
|
||
BEQ.S @mwhite ;special case source of all zeroes
|
||
CMP.L D5,D7 ;is source all ones?
|
||
BNE.S @mfullPartial ; no, go do normal case
|
||
|
||
@mblack ADDQ #4,A0 ;bump srcptr to next long
|
||
MOVE.L (A1)+,D5 ;OR 4 longs of the mask since the
|
||
OR.L D5,(A2)+ ; source is all ones
|
||
MOVE.L (A1)+,D5
|
||
OR.L D5,(A2)+
|
||
MOVE.L (A1)+,D5
|
||
OR.L D5,(A2)+
|
||
MOVE.L (A1)+,D5
|
||
OR.L D5,(A2)+
|
||
BRA.S @mnext ;go do more
|
||
|
||
@mwhite ADDQ #4,A0 ;bump srcptr to next long
|
||
MOVE.L (A1)+,D5 ;BIC 4 longs of the mask since the
|
||
NOT.L D5 ; source is all zeroes
|
||
AND.L D5,(A2)+
|
||
MOVE.L (A1)+,D5
|
||
NOT.L D5
|
||
AND.L D5,(A2)+
|
||
MOVE.L (A1)+,D5
|
||
NOT.L D5
|
||
AND.L D5,(A2)+
|
||
MOVE.L (A1)+,D5
|
||
NOT.L D5
|
||
AND.L D5,(A2)+
|
||
BRA.S @mnext ;go do more
|
||
|
||
@mnextPartial
|
||
BFEXTU (A0){D6:0},D5 ;get a long of source
|
||
@mfullPartial
|
||
MOVEQ #4,D4 ;init byte count
|
||
@mmorePartial
|
||
ROL.L #8,D5 ;get byte of source
|
||
MOVE.B D5,D1
|
||
MOVE.L 0(A3,D1.W*4),D0 ;get expanded long
|
||
MOVE.L (A2),D2 ;get the dest
|
||
EOR.L D2,D0
|
||
AND.L (A1)+,D0 ;splice them together with mask
|
||
EOR.L D2,D0
|
||
MOVE.L D0,(A2)+ ;plot resulting long
|
||
ADDQ #1,A0 ;bump srcptr by a byte
|
||
SUBQ #1,D4 ;dec byte count
|
||
DBEQ D3,@mmorePartial ;loop if more bytes and the run
|
||
DBNE D3,@mask ;loop if more of the run
|
||
BRA.S @inst ;get next run
|
||
|
||
|
||
@next SUBQ #4,D3 ;4 longs of the run have been done
|
||
BMI.S @inst ;if run is complete, get another
|
||
@blit CMP #3,D3 ;can we do at least 4 longs of dst?
|
||
BLT.S @nextPartial ; no, go do partial
|
||
|
||
@nextFull
|
||
BFEXTU (A0){D6:0},D5 ;get long of src
|
||
ADDQ #4,A0 ;bump srcptr to next long
|
||
BEQ.S @same ;special case source of all zeroes
|
||
CMP.L D5,D7 ;is source all ones?
|
||
BEQ.S @same ; yes, go handle in special case
|
||
|
||
@mixed SWAP D5 ;switch bytes ABCD in D5 to CDAB
|
||
MOVE.L D5,D0 ;D0 = CDAB
|
||
LSR.L #8,D5 ;D5 = 0CDA
|
||
MOVE.B D5,D1 ;get byte A alone
|
||
MOVE.L 0(A3,D1.W*4),(A2)+ ;expand it to the destination
|
||
MOVE.B D0,D1 ;get byte B alone
|
||
MOVE.L 0(A3,D1.W*4),(A2)+ ;expand it to the destination
|
||
SWAP D5 ;D5 = DA0C
|
||
MOVE.L 0(A3,D5.W*4),(A2)+ ;expand byte C to the destination
|
||
SWAP D0 ;D0 = ABCD
|
||
MOVE.B D0,D1 ;get byte D alone
|
||
MOVE.L 0(A3,D1.W*4),(A2)+ ;expand it to the destination
|
||
BRA.S @next ;go do more
|
||
|
||
@same MOVE.L D5,(A2)+ ;put down four longs of black or white
|
||
MOVE.L D5,(A2)+ ;FUN FACT: Doing a MOVE.L Dn,(An) is faster
|
||
MOVE.L D5,(A2)+ ; than doing a CLR.L (An)
|
||
MOVE.L D5,(A2)+
|
||
BRA.S @next ;go do more
|
||
|
||
@nextPartial
|
||
BFEXTU (A0){D6:0},D5 ;get a long of source
|
||
MOVEQ #4,D4 ;init byte count
|
||
@morePartial
|
||
ROL.L #8,D5 ;move high byte of source to low byte
|
||
MOVE.B D5,D1 ;get low byte alone
|
||
MOVE.L 0(A3,D1.W*4),(A2)+ ;plot expanded long
|
||
ADDQ #1,A0 ;bump srcptr by a byte
|
||
SUBQ #1,D4 ;dec byte count
|
||
DBEQ D3,@morePartial ;loop if more bytes and the run
|
||
DBNE D3,@blit ;loop if more of the run
|
||
BRA.S @inst ;get next run
|
||
|
||
|
||
;-------------------------------------------------------
|
||
;
|
||
; <14SEP90 SMC>
|
||
; scale and clip 1-bit color src to 8-bit color dst
|
||
;
|
||
;-------------------------------------------------------
|
||
; a0 = temp srcPtr d0 = scratch
|
||
; a1 = temp mskPtr d1 = scanCount/nibble mask
|
||
; a2 = temp dstPtr d2 = scratch
|
||
; a3 = scale table d3 = run count
|
||
; a4 = srcPtr d4 = part count
|
||
; a5 = dstPtr d5 = source data
|
||
; a6 = locals d6 = temp shift
|
||
; a7 = d7 = shift
|
||
;-------------------------------------------------------
|
||
|
||
scInd1ToInd8 ;One time initializations here
|
||
|
||
;if colorizing, go to loop that can handle it <5JUNE92 SAH>
|
||
btst #ScaleColorBit,XlateFlag+1(a6) ; <5JUNE92 SAH>
|
||
bne scIndToInd ;go to a colorizing loop <5JUNE92 SAH>
|
||
|
||
MOVE.L dstAlign(A6),D7 ;get dst alignment
|
||
ASR.L #3,D7 ;convert it to bytes
|
||
ADD.L srcAlign(A6),D7 ;and add src alignment
|
||
LEA Table8,A3 ;get scaling table
|
||
MOVE.L A3,scaleBltA3(A6) ;save for reload after seekMask
|
||
LEA @first,A0 ;go there from now on
|
||
MOVE.L A0,ScaleCase(A6) ;remember for later
|
||
JMP (A0) ;go to it
|
||
|
||
ALIGN Alignment
|
||
|
||
@nxtScan
|
||
ADD.L dstRow(A6),A5 ;bump dstptr to next row
|
||
ADD.L srcRow(A6),A4 ;bump srcptr to next row
|
||
ADDQ.W #1,vert(A6) ;bump down a scan line
|
||
SWAP D1 ;get scan count in low word
|
||
SUBQ #1,D1 ;dec scan count
|
||
BLE.S NXTMASK ;get next set of runs
|
||
|
||
@first MOVE.L A4,A0 ;init tmp src ptr
|
||
MOVE.L runBuf(A6),A1 ;point to run encoded mask buffer
|
||
MOVE.L A5,A2 ;init tmp dst ptr
|
||
MOVE.L D7,D6
|
||
SWAP D1 ;put scan count in high word
|
||
MOVE.W #$0F,D1 ;get low nibble mask
|
||
|
||
@inst MOVE.L (A1)+,D3 ;pick up next instruction long
|
||
BMI.S @nxtScan ;if high bit set then done with scan
|
||
ADD.W D3,A2 ;bump destptr by skip amount
|
||
MOVE.W D3,D0 ;make copy of bump <6>
|
||
EXT.L D0 ;extend it to a long <6>
|
||
ADD.L D0,D6 ;bump source shift by skip amount <6>
|
||
SWAP D3 ;get mask/blit cnt and check done flag
|
||
MOVEQ #-1,D0 ;fill register with ones for comparisons
|
||
BCLR #runMaskBit-16,d3 ;check and clear mask flag
|
||
BEQ.S @blit ;no mask, so go fast
|
||
BRA.S @mask ;start masking run
|
||
|
||
@mnext SUBQ #4,D3 ;4 longs of the run have been done
|
||
BMI.S @inst ;if run is complete, get another
|
||
@mask CMP #3,D3 ;can we do at least 4 longs of dst?
|
||
BLT.S @mnextPartial ; no, go do partial
|
||
|
||
MOVEQ #-1,D0 ;fill register with ones for comparisons
|
||
BFEXTU (A0){D6:16},D5 ;get word of src
|
||
BEQ.S @mwhite ;special case source of all zeroes
|
||
CMP D5,D0 ;is source all ones?
|
||
BNE.S @mfullPartial ; no, go do normal case
|
||
|
||
@mblack ADDQ #2,A0 ;bump srcptr to next word
|
||
MOVE.L (A1)+,D5 ;OR 4 longs of the mask since the
|
||
OR.L D5,(A2)+ ; source is all ones
|
||
MOVE.L (A1)+,D5
|
||
OR.L D5,(A2)+
|
||
MOVE.L (A1)+,D5
|
||
OR.L D5,(A2)+
|
||
MOVE.L (A1)+,D5
|
||
OR.L D5,(A2)+
|
||
BRA.S @mnext ;go do more
|
||
|
||
@mwhite ADDQ #2,A0 ;bump srcptr to next word
|
||
MOVE.L (A1)+,D5 ;BIC 4 longs of the mask since the
|
||
NOT.L D5 ; source is all zeroes
|
||
AND.L D5,(A2)+
|
||
MOVE.L (A1)+,D5
|
||
NOT.L D5
|
||
AND.L D5,(A2)+
|
||
MOVE.L (A1)+,D5
|
||
NOT.L D5
|
||
AND.L D5,(A2)+
|
||
MOVE.L (A1)+,D5
|
||
NOT.L D5
|
||
AND.L D5,(A2)+
|
||
BRA.S @mnext ;go do more
|
||
|
||
@mnextPartial
|
||
BFEXTU (A0){D6:16},D5 ;get a word of source
|
||
@mfullPartial
|
||
SWAP D5 ;move it to high word
|
||
MOVEQ #4,D4 ;init nibble count
|
||
@mmorePartial
|
||
ROL.L #4,D5 ;get nibble of source
|
||
AND.W D1,D5 ;get low 4 bits
|
||
MOVE.L 0(A3,D5.W*4),D0 ;get expanded long
|
||
MOVE.L (A2),D2 ;get the dest
|
||
EOR.L D2,D0
|
||
AND.L (A1)+,D0 ;splice them together with mask
|
||
EOR.L D2,D0
|
||
MOVE.L D0,(A2)+ ;plot resulting long
|
||
ADDQ.L #4,D6 ;bump source shift by a nibble
|
||
SUBQ #1,D4 ;dec nibble count
|
||
DBEQ D3,@mmorePartial ;loop if more nibbles and the run
|
||
DBNE D3,@mask ;loop if more of the run
|
||
BRA.S @inst ;get next run
|
||
|
||
|
||
@next SUBQ #4,D3 ;4 longs of the run have been done
|
||
BMI.S @inst ;if run is complete, get another
|
||
@blit CMP #3,D3 ;can we do at least 4 longs of dst?
|
||
BLT.S @nextPartial ; no, go do partial
|
||
|
||
@nextFull
|
||
BFEXTS (A0){D6:16},D5 ;get word of src and extend to long
|
||
ADDQ #2,A0 ;bump srcptr to next word
|
||
BEQ.S @same ;special case source of all zeroes
|
||
CMP D5,D0 ;is source all ones?
|
||
BEQ.S @same ; yes, go handle in special case
|
||
|
||
@allMixed ;expand 1 word of src into 4 longs of dst
|
||
SWAP D5 ;move source to high word
|
||
ROL.L #4,D5 ;get first nibble of source
|
||
AND.W D1,D5 ;get low 4 bits
|
||
MOVE.L 0(A3,D5.W*4),(A2)+ ;plot the expanded long
|
||
|
||
ROL.L #4,D5 ;do it again
|
||
AND.W D1,D5
|
||
MOVE.L 0(A3,D5.W*4),(A2)+
|
||
|
||
ROL.L #4,D5 ;and again
|
||
AND.W D1,D5
|
||
MOVE.L 0(A3,D5.W*4),(A2)+
|
||
|
||
ROL.L #4,D5 ;and again
|
||
AND.W D1,D5
|
||
MOVE.L 0(A3,D5.W*4),(A2)+
|
||
BRA.S @next ;go do more
|
||
|
||
@same MOVE.L D5,(A2)+ ;put down four longs of black or white
|
||
MOVE.L D5,(A2)+ ;FUN FACT: Doing a MOVE.L Dn,(An) is faster
|
||
MOVE.L D5,(A2)+ ; than doing a CLR.L (An)
|
||
MOVE.L D5,(A2)+
|
||
BRA.S @next ;go do more
|
||
|
||
@nextPartial
|
||
BFEXTU (A0){D6:16},D5 ;get a word of source
|
||
SWAP D5 ;move it to high word
|
||
MOVEQ #4,D4 ;init nibble count
|
||
@morePartial
|
||
ROL.L #4,D5 ;get nibble of source
|
||
AND.W D1,D5 ;get low 4 bits
|
||
MOVE.L 0(A3,D5.W*4),(A2)+ ;plot expanded long
|
||
ADDQ.L #4,D6 ;bump source shift by a nibble
|
||
SUBQ #1,D4 ;dec nibble count
|
||
DBEQ D3,@morePartial ;loop if more nibbles and the run
|
||
DBNE D3,@blit ;loop if more of the run
|
||
BRA.S @inst ;get next run
|
||
|
||
|
||
;-------------------------------------------------------
|
||
;
|
||
; <14SEP90 SMC>
|
||
; scale and clip 8-bit color src to 8-bit color dst
|
||
;
|
||
;-------------------------------------------------------
|
||
; a0 = temp srcPtr d0 = vert/scratch
|
||
; a1 = temp mskPtr d1 = scanCount/pixel cnt
|
||
; a2 = temp dstPtr d2 = scratch
|
||
; a3 = scale table d3 = run count
|
||
; a4 = srcPtr d4 = source cache
|
||
; a5 = dstPtr d5 = scratch
|
||
; a6 = locals d6 =
|
||
; a7 = d7 = dest cache
|
||
;-------------------------------------------------------
|
||
|
||
scInd8ToInd8 ;One time initializations here
|
||
MOVE.L dstAlign(a6),D0 ;get dest alignment
|
||
ASR.L #3,D0 ;and convert to pixels
|
||
MOVE.L srcAlign(A6),D2 ;get src alignment
|
||
ASR.L #3,D2 ;and convert to pixels
|
||
ADD.L D2,D0 ;add them together
|
||
ADD.L D0,A4 ;back off src ptr to beginning of dst long
|
||
MOVE.L SCALETBL(A6),A3 ;get mapping table
|
||
|
||
LEA @first,A0 ;come here from now on
|
||
MOVE.L A3,scaleBltA3(A6) ;save for reload after seekMask
|
||
MOVE.L A0,ScaleCase(A6) ;remember for later
|
||
|
||
MOVEQ #0,D4 ;use zero for initial input cache
|
||
MOVE.L (A3),D0 ;compute output cache value
|
||
MOVE.B D0,D7 ;map 1st byte
|
||
LSL.L #8,D7
|
||
MOVE.B D0,D7 ;map 2nd byte
|
||
MOVE.W D7,D0 ;get 2 mapped bytes
|
||
SWAP D7
|
||
MOVE.W D0,D7 ;map 3rd and 4th bytes
|
||
|
||
JMP (A0) ;go to it
|
||
|
||
@nxtScan
|
||
ADD.L dstRow(A6),A5 ;bump dstptr to next row
|
||
ADD.L srcRow(A6),A4 ;bump srcptr to next row
|
||
ADDQ.W #1,vert(A6) ;bump down a scan line
|
||
SUBQ #1,D1 ;dec scan count
|
||
BLE.S NXTMASK ;get next set of runs
|
||
|
||
@first MOVE.L A4,A0 ;init tmp src ptr
|
||
MOVE.L runBuf(A6),A1 ;point to run encoded mask buffer
|
||
MOVE.L A5,A2 ;init tmp dst ptr
|
||
MOVEQ #0,D5 ;clear out high bytes
|
||
|
||
@inst MOVE.L (A1)+,d3 ;pick up next instruction long
|
||
BMI.S @nxtScan ;if high bit set then done with scan
|
||
ADD.W D3,A0 ;bump srcptr by skip amount
|
||
ADD.W D3,A2 ;bump destptr by skip amount
|
||
SWAP D3 ;get mask/blit cnt and check done flag
|
||
BCLR #runMaskBit-16,D3 ;check and clear mask flag
|
||
BEQ.S @blit ;no mask, so go fast
|
||
|
||
@mask MOVE.L (A0)+,D0 ;get a long of src
|
||
CMP.L D0,D4 ;same as last time (cache) ?
|
||
BEQ.S @msame ;yes, use cache
|
||
MOVE.L D0,D4 ;save last src for cache
|
||
|
||
MOVE.B D0,D5 ;color map four bytes of source
|
||
MOVE.B 3(A3,D5.W*4),D0
|
||
ROL.L #8,D0
|
||
MOVE.B D0,D5
|
||
MOVE.B 3(A3,D5.W*4),D0
|
||
ROL.L #8,D0
|
||
MOVE.B D0,D5
|
||
MOVE.B 3(A3,D5.W*4),D0
|
||
ROL.L #8,D0
|
||
MOVE.B D0,D5
|
||
MOVE.B 3(A3,D5.W*4),D0
|
||
ROL.L #8,D0
|
||
MOVE.L D0,D7 ;remember result of mapping
|
||
|
||
@msame MOVE.L (A2),D0 ;get a long of dst
|
||
MOVE.L D7,D2 ;get a copy of mapping result
|
||
EOR.L D0,D2
|
||
AND.L (A1)+,D2 ;splice them together with the mask
|
||
EOR.L D0,D2
|
||
MOVE.L D2,(A2)+ ;move the result out to dst
|
||
DBRA D3,@mask ;continue this run
|
||
BRA.s @inst ;get another run
|
||
|
||
@blit MOVE.L (A0)+,D0 ;get a long of source
|
||
cmp.l d0,d4 ;same as last time (cache) ?
|
||
beq.s @same ;yes, use cache
|
||
move.l d0,d4 ;save last src for cache
|
||
|
||
MOVE.B D0,D5 ;color map four bytes of source
|
||
MOVE.B 3(A3,D5.W*4),D0
|
||
ROL.L #8,D0
|
||
MOVE.B D0,D5
|
||
MOVE.B 3(A3,D5.W*4),D0
|
||
ROL.L #8,D0
|
||
MOVE.B D0,D5
|
||
MOVE.B 3(A3,D5.W*4),D0
|
||
ROL.L #8,D0
|
||
MOVE.B D0,D5
|
||
MOVE.B 3(A3,D5.W*4),D0
|
||
ROL.L #8,D0
|
||
MOVE.L D0,D7 ;remember result of mapping
|
||
|
||
@same MOVE.L D7,(A2)+ ;move the result to dst
|
||
DBRA D3,@blit ;continue this run
|
||
BRA.s @inst ;get another run
|
||
|
||
|
||
;-------------------------------------------------------
|
||
;
|
||
; <14SEP90 SMC>
|
||
; scale and clip 8-bit color src to 1-bit color dst
|
||
;
|
||
;-------------------------------------------------------
|
||
; a0 = TMPSRCPTR d0 = vert/scratch
|
||
; a1 = TMPMSKPTR d1 = scanCount/pixel cnt
|
||
; a2 = TMPDSTPTR d2 = SCRATCH
|
||
; a3 = SCALETBL d3 = RUN COUNT
|
||
; a4 = srcPtr d4 = SOURCE CACHE
|
||
; a5 = dstPtr d5 =
|
||
; a6 = locals d6 =
|
||
; a7 = d7 = DEST CACHE
|
||
;-------------------------------------------------------
|
||
|
||
scInd8ToInd1 ;One time initializations here
|
||
MOVE.L dstAlign(a6),D0 ;get dst alignment
|
||
MOVE.L srcAlign(A6),D2 ;get src alignment
|
||
ASR.L #3,D2 ; and convert it to dest pixels
|
||
ADD.L D2,D0 ;add them together
|
||
ADD.L D0,A4 ;back off src ptr to beginning of dst long
|
||
MOVE.L SCALETBL(A6),A3 ;get mapping table
|
||
|
||
LEA @first,A0 ;come here from now on
|
||
MOVE.L A3,scaleBltA3(A6) ;save for reload after seekMask
|
||
MOVE.L A0,ScaleCase(A6) ;remember for later
|
||
JMP (A0) ;go to it
|
||
|
||
ALIGN Alignment
|
||
|
||
@nxtScan
|
||
ADD.L dstRow(A6),A5 ;bump dstptr to next row
|
||
ADD.L srcRow(A6),A4 ;bump srcptr to next row
|
||
ADDQ.W #1,vert(A6) ;bump down a scan line
|
||
SUBQ #1,D1 ;dec scan count
|
||
BLE.S NXTMASK ;get next set of runs
|
||
|
||
@first MOVE.L A4,A0 ;init tmp src ptr
|
||
MOVE.L runBuf(A6),A1 ;point to run encoded mask buffer
|
||
MOVE.L A5,A2 ;init tmp dst ptr
|
||
MOVEQ #0,D5 ;clear out high bytes
|
||
|
||
@inst MOVE.L (a1)+,d3 ;pick up next instruction long
|
||
BMI.S @nxtScan ;if high bit set then done with scan
|
||
ADD.W D3,A2 ;bump dstptr by skip amount
|
||
LEA (A0,D3.W*8),A0 ;bump srcptr by skip amount * 8
|
||
SWAP D3 ;get mask/blit cnt and check done flag
|
||
BCLR #runMaskBit-16,D3 ;check and clear mask flag
|
||
BEQ.S @blit ;no mask, so go fast
|
||
|
||
@mask BSR.S Map8To1 ;get a long of converted source
|
||
MOVE.L (A2),D7 ;get a long of dest
|
||
MOVE.L D0,D2 ;make copy of mapping result
|
||
EOR.L D7,D2
|
||
AND.L (A1)+,D2 ;splice them together using mask
|
||
EOR.L D7,D2
|
||
MOVE.L D2,(A2)+ ;move long result to dest
|
||
DBRA D3,@mask ;continue this run
|
||
BRA.s @inst ;get next run
|
||
|
||
@blit BSR.S Map8To1 ;get a long of converted source
|
||
MOVE.L D0,(A2)+ ;move it to dest
|
||
DBRA D3,@blit ;continue the run
|
||
BRA.s @inst ;get next run
|
||
|
||
|
||
Map8To1 MOVE.L (A3),D0 ;set up for "caching"
|
||
BEQ.S @0 ;leave white if 0 index is white
|
||
MOVEQ #$0F,D0 ;else, put black in cache
|
||
@0: MOVEQ #7,D7 ;init nibble count
|
||
MOVEQ #0,D4 ;clear out cache
|
||
@1: MOVE.L (A0)+,D6 ;get a long of src
|
||
CMP.L D6,D4 ;same as last time?
|
||
BEQ.S @same ; yes, dupe previous result
|
||
MOVE.L D6,D4 ;remember for next time
|
||
|
||
SWAP D6 ;get next pixel
|
||
MOVE.B D6,D5 ;get current pixel
|
||
LSR.W #8,D6
|
||
MOVE.B 3(A3,D6.W*4),D6 ;get mapped bit
|
||
LSR.W #1,D6 ;get bit into carry
|
||
ADDX.L D0,D0 ;shift it in
|
||
MOVE.B 3(A3,D5.W*4),D5 ;get mapped bit
|
||
LSR.W #1,D5 ;get bit into carry
|
||
ADDX.L D0,D0 ;shift it in
|
||
|
||
SWAP D6 ;get next pixel
|
||
MOVE.B D6,D5 ;get current pixel
|
||
LSR.W #8,D6
|
||
MOVE.B 3(A3,D6.W*4),D6 ;get mapped bit
|
||
LSR.W #1,D6 ;get bit into carry
|
||
ADDX.L D0,D0 ;shift it in
|
||
MOVE.B 3(A3,D5.W*4),D5 ;get mapped bit
|
||
LSR.W #1,D5 ;get bit into carry
|
||
ADDX.L D0,D0 ;shift it in
|
||
|
||
DBRA D7,@1 ;go do next of 8 nibbles
|
||
RTS
|
||
|
||
@same MOVEQ #$0F,D5 ;get nibble mask
|
||
AND.B D0,D5 ;get just result of last mapping
|
||
LSL.L #4,D0 ;duplicate it
|
||
OR.B D5,D0 ;and combine for current mapping
|
||
DBRA D7,@1 ;go do next of 8 nibbles
|
||
RTS
|
||
|
||
|
||
;-------------------------------------------------------
|
||
;
|
||
; scale and clip indexed source to 16-bit dst
|
||
; <SAH 060292>
|
||
; put in special case for 1->16 using Sean Callahan's
|
||
; code from 1->32
|
||
;
|
||
;-------------------------------------------------------
|
||
; a0 = tmpsrc d0 = vert/scratch
|
||
; a1 = tmpmask d1 = scanCount
|
||
; a2 = tmpdst d2 = scratch
|
||
; a3 = scaleTbl d3 = run cnt
|
||
; a4 = srcPtr/patPtr d4 = src pixel size
|
||
; a5 = dstPtr d5 = scratch
|
||
; a6 = locals d6 = bit offset in src
|
||
; a7 = d7 = src shift
|
||
;-------------------------------------------------------
|
||
scNonBWto16
|
||
move srcShift(a6),d7 ;set this up once
|
||
move.l scaleTbl(a6),a3 ;set this up once
|
||
|
||
lea first16,a0 ;go here from now on
|
||
move.l A3,scaleBltA3(a6) ;save for reload after seekMask
|
||
move.l a0,ScaleCase(a6) ;remember for later
|
||
bra.s first16 ;go to it
|
||
|
||
nxtScan16
|
||
add.l dstRow(a6),a5 ;BUMP DST TO NEXT ROW
|
||
add.l srcRow(a6),a4 ;BUMP src TO NEXT ROW
|
||
addq.w #1,vert(a6) ;BUMP DOWN A SCAN LINE
|
||
subq #1,d1
|
||
ble NXTMASK
|
||
|
||
first16
|
||
move.l dstAlign(a6),d2 ;get initial dst offset
|
||
asr.l #4,d2 ;convert it to pixels
|
||
asl.l d7,d2 ;and convert it to src bits
|
||
move.l srcAlign(a6),d6 ;start with initial src offset
|
||
move.l a4,a0 ;init tmp src ptr
|
||
;now make sure the source is long aligned
|
||
move.w a0,d5
|
||
and.w #3,d5 ;get the non-long address
|
||
beq.s @srcAligned ;branch if aligned
|
||
sub.w d5,a0 ;align the source
|
||
lsl.w #3,d5 ;turn it into a bit offset
|
||
add.w d5,d6 ;add it to the src index
|
||
@srcAligned
|
||
add.w d2,d6 ;back up the number of dst pixels
|
||
bge.s @srcOK ;make sure we didn't go negative
|
||
add.w #$20,d6 ;figure out where to start in the new src long
|
||
subq.l #4,a0 ;back up the src
|
||
@srcOK
|
||
cmp.w #$1f,d6 ;make sure we didn't overshoot this long
|
||
ble.s @srcAligned2
|
||
addq.l #4,a0 ;bump src ptr to next long
|
||
and.w #$1f,d6 ;and find where we are inside it
|
||
@srcAligned2
|
||
move.l a5,a2 ;init tmp dst ptr
|
||
move.l runBuf(a6),a1 ;point to run encoded mask buffer
|
||
|
||
inst16 move.l (a1)+,d3 ;pick up next instruction long
|
||
bmi.s nxtScan16 ;if high bit set then done with scan
|
||
add.w d3,a2 ;bump destptr by skip amount
|
||
lsr.w #1,d3 ;make byte skip into pixel skip
|
||
lsl.w d7,d3 ;make into bit skip
|
||
add.w d3,d6 ;bump src offset
|
||
move d6,d3 ;make a copy
|
||
lsr.w #5,d3 ;make into long cnt
|
||
lea (a0,d3.w*4),a0 ;bump src ptr
|
||
swap d3 ;get mask/blit cnt and check done flag
|
||
|
||
BCLR #runMaskBit-16,D3 ;check and clear mask flag
|
||
BNE MASKRUN16
|
||
|
||
@blit MOVE.L (A0)+,D5 ;GET FIRST LONG OF SRC
|
||
@NXPXL BFEXTU D5{D6:D4},D0 ;GET A PIXEL OF SRC
|
||
ADD D4,D6 ;ADVANCE TO NEXT SRC PIXEL
|
||
MOVE.L 0(A3,D0*4),D2 ;TRANSLATE IT
|
||
and.w #$1f,D6 ;TIME FOR NEXT SRC LONG?
|
||
bne.s @srcOK
|
||
MOVE.L (A0)+,D5 ;GET NEXT LONG OF SRC
|
||
@srcOK
|
||
SWAP D2 ;MOVE LAST PIXEL INTO HIGH WORD
|
||
BFEXTU D5{D6:D4},D0 ;GET A PIXEL OF SRC
|
||
MOVE.W 2(A3,D0*4),D2 ;TRANSLATE IT
|
||
ADD D4,D6 ;ADVANCE TO NEXT SRC PIXEL
|
||
ext.l d6 ;bfext uses all of it
|
||
MOVE.L D2,(A2)+ ;WRITE OUT LONG TO DST
|
||
AND #$1f,D6 ;TIME FOR NEXT SRC LONG?
|
||
DBEQ D3,@NXPXL ;LOOP ALL PIXELS THIS LONG
|
||
DBNE D3,@blit ;LOOP ALL PIXELS THIS RUN
|
||
beq.s inst16 ;LOOP BACK FOR more runs
|
||
subq.w #4,a0 ;point back to remaining pixels
|
||
BRA.s inst16 ;LOOP BACK FOR more runs
|
||
|
||
|
||
MASKRUN16
|
||
@BLIT MOVE.L (A0)+,D5 ;GET FIRST LONG OF SRC
|
||
@NXPXL2 BFEXTU D5{D6:D4},D0 ;GET A PIXEL OF SRC
|
||
ADD D4,D6 ;ADVANCE TO NEXT SRC PIXEL
|
||
MOVE.l 0(A3,D0*4),D2 ;TRANSLATE IT
|
||
AND #$1f,D6 ;TIME FOR NEXT SRC LONG?
|
||
BNE.S @srcOK
|
||
MOVE.L (A0)+,D5 ;GET NEXT LONG OF SRC
|
||
@srcOK
|
||
SWAP D2 ;MOVE LAST PIXEL INTO HIGH WORD
|
||
BFEXTU D5{D6:D4},D0 ;GET A PIXEL OF SRC
|
||
ADD D4,D6 ;ADVANCE TO NEXT SRC PIXEL
|
||
MOVE.W 2(A3,D0*4),D2 ;TRANSLATE IT
|
||
MOVE.L (A2),D0 ;GET LONG OF DST
|
||
EOR.L D0,D2
|
||
AND.L (A1)+,D2
|
||
EOR.L D0,D2
|
||
MOVE.L D2,(A2)+
|
||
AND #$1f,D6 ;TIME FOR NEXT SRC LONG?
|
||
DBEQ D3,@NXPXL2 ;LOOP ALL PIXELS THIS LONG
|
||
DBNE D3,@blit ;LOOP ALL PIXELS THIS RUN
|
||
beq.s inst16 ;LOOP BACK FOR more runs
|
||
subq.w #4,a0 ;point back to remaining pixels
|
||
BRA.s inst16 ;LOOP BACK FOR more runs
|
||
|
||
scIndexedto16
|
||
MOVE.L scaleTbl(A6),A3 ;set this up once
|
||
CMP.W #1,D4 ;is src one bit?
|
||
BNE.S scNonBWto16
|
||
TST.L 4(A3) ;is second color black?
|
||
BNE.S scNonBWto16
|
||
MOVE.L #$7FFF,D0
|
||
CMP.L (A3),D0 ;is first color white?
|
||
BNE.S scNonBWto16
|
||
|
||
MOVE.W D0,D4 ;move white mask to better register
|
||
SWAP D4
|
||
MOVE.W D0,D4
|
||
LEA @first,A0 ;go here from now on
|
||
MOVE.L A0,ScaleCase(A6) ;remember for later
|
||
BRA.S @first ;go to it
|
||
|
||
|
||
@next ADD.L dstRow(A6),A5 ;BUMP DST TO NEXT ROW
|
||
ADD.L srcRow(A6),A4 ;BUMP src TO NEXT ROW
|
||
ADDQ.W #1,vert(A6) ;BUMP DOWN A SCAN LINE
|
||
SUBQ #1,D1
|
||
BLE.S NXTMASK
|
||
|
||
@first
|
||
MOVE.L dstAlign(a6),D6 ;get dest alignment
|
||
ASR.L #4,D6 ;and convert to dst pixels
|
||
ADD.L srcAlign(A6),D6 ;add src alignment
|
||
MOVE.L A4,A0 ;init tmp src ptr
|
||
MOVE.L A5,A2 ;init tmp dst ptr
|
||
MOVE.L runBuf(A6),A1 ;point to run encoded mask buffer
|
||
|
||
@inst MOVE.L (A1)+,D3 ;pick up next instruction long
|
||
BMI.S @next ;if high bit set then done with scan
|
||
ADD.W D3,A2 ;bump destptr by skip amount
|
||
LSR.W #1,D3 ;byte skip to pixel skip
|
||
MOVEQ #0,D2 ;clear out d2
|
||
MOVE.W D3,D2 ;get a LONG bit skip
|
||
ADD.L D2,D6 ;add to current skip
|
||
SWAP D3 ;get mask/blit cnt and check done flag
|
||
|
||
BCLR #runMaskBit-16,D3 ;check and clear mask flag
|
||
BNE @doMaskedRun
|
||
|
||
@blit MOVEQ #$07,D2
|
||
ADDQ.W #1,D3
|
||
AND.W D3,D2
|
||
LSR.W #3,D3
|
||
SUBQ.W #1,D3
|
||
BMI.S @no16
|
||
|
||
@reblit BFEXTS (A0){D6:16},D0
|
||
ADDQ.W #2,A0
|
||
BEQ.S @white
|
||
NOT.L D0
|
||
BEQ.S @black
|
||
|
||
MOVEQ #1,D5
|
||
@pixel ADD.W D0,D0
|
||
SUBX.L D7,D7
|
||
ADD.W D0,D0
|
||
SUBX.W D7,D7
|
||
AND.L D4,D7
|
||
MOVE.L D7,(A2)+
|
||
ADD.W D0,D0
|
||
SUBX.L D7,D7
|
||
ADD.W D0,D0
|
||
SUBX.W D7,D7
|
||
AND.L D4,D7
|
||
MOVE.L D7,(A2)+
|
||
ADD.W D0,D0
|
||
SUBX.L D7,D7
|
||
ADD.W D0,D0
|
||
SUBX.W D7,D7
|
||
AND.L D4,D7
|
||
MOVE.L D7,(A2)+
|
||
ADD.W D0,D0
|
||
SUBX.L D7,D7
|
||
ADD.W D0,D0
|
||
SUBX.W D7,D7
|
||
AND.L D4,D7
|
||
MOVE.L D7,(A2)+
|
||
DBRA D5,@pixel
|
||
DBRA D3,@reblit
|
||
BRA.S @no16
|
||
|
||
@white MOVE.L D4,D0
|
||
@black MOVE.L D0,(A2)+
|
||
MOVE.L D0,(A2)+
|
||
MOVE.L D0,(A2)+
|
||
MOVE.L D0,(A2)+
|
||
MOVE.L D0,(A2)+
|
||
MOVE.L D0,(A2)+
|
||
MOVE.L D0,(A2)+
|
||
MOVE.L D0,(A2)+
|
||
DBRA D3,@reblit
|
||
|
||
@no16 SUBQ.W #1,D2
|
||
BMI.S @inst
|
||
@last15 BFEXTS (A0){D6:16},D0
|
||
NOT.L D0
|
||
EXT.L D2
|
||
ADD.L D2,D6
|
||
ADD.L D2,D6 ;2 pixels per long
|
||
ADDQ.L #2,D6 ;the 1 we subtracted above
|
||
@sloop ADD.W D0,D0
|
||
SUBX.L D7,D7
|
||
ADD.W D0,D0
|
||
SUBX.W D7,D7
|
||
AND.L D4,D7
|
||
MOVE.L D7,(A2)+
|
||
DBRA D2,@sloop
|
||
BRA.S @inst
|
||
|
||
@doMaskedRun
|
||
MOVE.W D3,D2
|
||
AND.W #$7,D2
|
||
SUB.W D2,D3
|
||
BFEXTS (A0){D6:16},D0
|
||
NOT.L D0
|
||
EXT.L D2
|
||
ADD.L D2,D6
|
||
ADD.L D2,D6 ;2 pixels per long
|
||
ADDQ.L #2,D6 ;we're about to do 2 pixels
|
||
@maskPixels
|
||
ADD.W D0,D0
|
||
SUBX.L D7,D7
|
||
ADD.W D0,D0
|
||
SUBX.W D7,D7
|
||
AND.L D4,D7
|
||
MOVE.L (A2),D5 ;get a long of dest
|
||
EOR.L D5,D7
|
||
AND.L (A1)+,D7 ;splice them together using mask
|
||
EOR.L D5,D7
|
||
MOVE.L D7,(A2)+
|
||
DBRA D2,@maskPixels
|
||
DBRA D3,@doMaskedRun
|
||
BRA.S @inst
|
||
|
||
;-------------------------------------------------------
|
||
;
|
||
; <28MAY92 SAH>
|
||
; scale and clip indexed source to indexed dst
|
||
;
|
||
; <SM7>
|
||
; If mask data contains an offset, then set the destination alignment
|
||
; to 0 and recalculate the source alignment value. Use the high word
|
||
; of D4 to store srcShift-dstShift value; this value is used to
|
||
; convert a destination alignment value to a source alignment value.
|
||
; If srcShift-dstShift >= 0 (higher bit depth to lower bit depth), then
|
||
; shift the dstAlign value to the left; if srcShift-dstShift < 0
|
||
; (lower bit depth to higher bit depth), then shift the dstAlign value to
|
||
; the right. Subtract the resulting value from the source offset value;
|
||
; this causes the source buffer pointer to be offset by the appropriate
|
||
; value and a new srcAlign value to be calculated.
|
||
;
|
||
;-------------------------------------------------------
|
||
; a0 = tmpsrc d0 = vert/scratch
|
||
; a1 = tmpmask d1 = scanCount/scratch
|
||
; a2 = tmpdst d2 = scratch / dst pixel
|
||
; a3 = scaleTbl d3 = run cnt / scanCount
|
||
; a4 = srcPtr/patPtr d4 = srcShift-dstShift / dst pixel size <SM7>
|
||
; a5 = dstPtr d5 = scratch
|
||
; a6 = locals d6 = bit offset in src / offset in dst
|
||
; a7 = d7 = src shift / dst shift
|
||
;-------------------------------------------------------
|
||
|
||
scIndtoInd
|
||
;One time initializations here
|
||
|
||
;compute the dst pix to src pix shift
|
||
moveq.l #3,d7
|
||
sub.w dstShift(a6),d7 ;get dst shift
|
||
add.w srcShift(a6),d7 ;set this up once
|
||
swap d7 ;and save in high word
|
||
|
||
move.w dstpix+pixelsize(a6),d7 ;get dst pix size
|
||
|
||
move.l scaleTbl(a6),a3 ;set this up once
|
||
|
||
swap d4 ;use high word <SM7>
|
||
move.w srcShift(a6),d4 ;calculate the difference of <SM7>
|
||
sub.w dstShift(a6),d4 ;source and destination bit shifts <SM7>
|
||
swap d4 ;use low word <SM7>
|
||
|
||
lea @first,a0 ;go here from now on
|
||
move.l A3,scaleBltA3(a6) ;save for reload after seekMask
|
||
move.l a0,ScaleCase(a6) ;remember for later
|
||
bra.s @first ;go to it
|
||
|
||
@nxtScan
|
||
move.l dstRow(a6),d2 ;get dst rowbytes
|
||
add.l d2,a5 ;BUMP DST TO NEXT ROW
|
||
move.l srcRow(a6),d2 ;get src rowbytes
|
||
add.l d2,a4 ;BUMP src TO NEXT ROW
|
||
addq.w #1,vert(a6) ;BUMP DOWN A SCAN LINE
|
||
swap d3
|
||
move.w d3,d1
|
||
subq.w #1,d1
|
||
ble.s NXTMASK
|
||
@first
|
||
move.w d1,d3 ;save d1 in case run is 0 below
|
||
swap d3 ;put in right place
|
||
|
||
move.l dstAlign(a6),d6 ;get the dst offset
|
||
neg.l d6 ;convert offset to positive
|
||
and.w #$1f,d6 ;make it mod 32
|
||
move.w d6,d0 ;and keep it for the first pixel
|
||
swap d6 ;make room for src offset
|
||
move.w srcAlign+2(a6),d6 ;start with initial src offset
|
||
move.l a4,a0 ;init tmp src ptr
|
||
;now make sure the source is long aligned
|
||
move.w a0,d5
|
||
and.w #3,d5 ;get the non-long address
|
||
beq.s @srcAligned ;branch if aligned
|
||
sub.w d5,a0 ;align the source
|
||
lsl.w #3,d5 ;turn it into a bit offset
|
||
add.w d5,d6 ;add it to the src index
|
||
cmp.w #$1f,d6 ;make sure we didn't overshoot this long
|
||
ble.s @srcAligned
|
||
addq.l #4,a0 ;bump src ptr to next long
|
||
and.w #$1f,d6 ;and find where we are inside it
|
||
@srcAligned
|
||
|
||
move.l a5,a2 ;init tmp dst ptr
|
||
move.l runBuf(a6),a1 ;point to run encoded mask buffer
|
||
|
||
@inst
|
||
move.l (a1)+,d2 ;pick up next instruction long
|
||
bmi.s @nxtScan ;if high bit set then done with scan
|
||
move.w d2,d5 ;get copy of skip
|
||
beq.s @noOffset
|
||
|
||
add.w d5,a2 ;bump destptr by skip amount
|
||
swap d7 ;get shift
|
||
lsl.w d7,d5 ;make into bit skip
|
||
swap d7 ;put shift back
|
||
swap d4 ;get bit shift difference <SM7>
|
||
tst.w d4 ;shift left or right? <SM7>
|
||
bmi.s @shiftRight ;shift right <SM7>
|
||
lsl.w d4,d0 ;convert dst alignment to src alignment <SM7>
|
||
bra.s @afterShift ; <SM7>
|
||
@shiftRight ; <SM7>
|
||
neg.w d4 ;get absolute value <SM7>
|
||
lsr.w d4,d0 ;convert dst alignment to src alignment <SM7>
|
||
neg.w d4 ;revert shift difference value <SM7>
|
||
@afterShift ; <SM7>
|
||
swap d4 ;get dst pixel size <SM7>
|
||
sub.w d0,d5 ;subtract <SM7>
|
||
move.w #0,d0 ;no dst alignment <SM7>
|
||
add.w d5,d6 ;bump src offset
|
||
move.w d6,d5 ;make a copy
|
||
and.w #$1f,d6 ;make offset mod 32
|
||
lsr.w #5,d5 ;make a long count
|
||
lea (a0,d5.w*4),a0 ;bump src ptr
|
||
@noOffset
|
||
swap d2 ;get mask/blit cnt and check done flag
|
||
move.w d2,d3
|
||
|
||
BCLR #runMaskBit-16,D3 ;check and clear mask flag
|
||
BEQ.S @blit ;no mask, so go fast
|
||
|
||
@mask BSR.S @MapIndToInd ;get a long of converted source
|
||
MOVE.L (A2),D5 ;get a long of dest
|
||
EOR.L D5,D2
|
||
AND.L (A1)+,D2 ;splice them together using mask
|
||
EOR.L D5,D2
|
||
MOVE.L D2,(A2)+ ;move long result to dest
|
||
DBRA D3,@mask ;continue this run
|
||
BRA.s @inst ;get next run
|
||
|
||
@blit BSR.S @MapIndToInd ;get a long of converted source
|
||
MOVE.L D2,(A2)+ ;move it to dest
|
||
DBRA D3,@blit ;continue the run
|
||
BRA.s @inst ;get next run
|
||
|
||
|
||
@MapIndToInd
|
||
move.w d0,d1 ;init dst offset
|
||
@getsrcLong
|
||
MOVE.L (a0)+,d5 ;GET FIRST LONG OF SRC
|
||
@NXPXL bfextu d5{d6:d4},d0 ;GET A PIXEL OF SRC
|
||
move.l (a3,d0*4),d0 ;TRANSLATE IT
|
||
bfins d0,d2{d1:d7} ;and put it to dst
|
||
add.w d7,d1 ;advance to next dst pixel
|
||
and.w #$1f,d1 ;check if done all dst long
|
||
beq.s @doneDstLong
|
||
add d4,d6 ;ADVANCE TO NEXT SRC PIXEL
|
||
and.w #$1f,d6 ;TIME FOR NEXT SRC LONG?
|
||
bne.s @NXPXL ;no, so do next pixel
|
||
bra.s @getsrcLong ;go grab next src long
|
||
@doneDstLong
|
||
add.w d4,d6 ;move to next src pixel
|
||
and.w #$1f,d6 ;mod 32
|
||
beq.s @doneRun ;LOOP BACK FOR more runs
|
||
subq.w #4,a0 ;point back to remaining pixels
|
||
@doneRun
|
||
moveq.l #0,d0 ;dst offset is now zero
|
||
rts ;return for more runs
|
||
|
||
|
||
;-------------------------------------------------------
|
||
|
||
|
||
|
||
scCopy16toIndexed
|
||
scDither16
|
||
scGray16
|
||
scDitherGray16
|
||
scCopy32toIndexed
|
||
scDither32
|
||
scGray32
|
||
scDitherGray32
|
||
scCopy32to16
|
||
scCopy16to32
|
||
|
||
|
||
Bogus ;_debugger
|
||
bra Done
|
||
;
|
||
;-----------------------------------------------------------------
|
||
|
||
Align 4
|
||
|
||
;-----------------------------------------------------------------
|
||
;
|
||
; ScaleCase tables.
|
||
;
|
||
|
||
|
||
;Source is direct data
|
||
|
||
;1-Bit Blits
|
||
scDirTab1
|
||
DC.L scCopy16toIndexed-scDirTab1 ;0 16 to 1
|
||
DC.L scDither16-scDirTab1 ;1 16 to 1 dither
|
||
DC.L scGray16-scDirTab1 ;2 16 to 1 gray
|
||
DC.L scDitherGray16-scDirTab1 ;3 16 to 1 gray+dither
|
||
DC.L scCopy32toIndexed-scDirTab1 ;4 32 to 1
|
||
DC.L scDither32-scDirTab1 ;5 32 to 1 dither
|
||
DC.L scGray32-scDirTab1 ;6 32 to 1 gray
|
||
DC.L scDitherGray32-scDirTab1 ;7 32 to 1 gray+dither
|
||
|
||
;2-Bit Blits
|
||
scDirTab2
|
||
DC.L scCopy16toIndexed-scDirTab2 ;0 16 to 2
|
||
DC.L scDither16-scDirTab2 ;1 16 to 2 dither
|
||
DC.L scGray16-scDirTab2 ;2 16 to 2 gray
|
||
DC.L scDitherGray16-scDirTab2 ;3 16 to 2 gray+dither
|
||
DC.L scCopy32toIndexed-scDirTab2 ;4 32 to 2
|
||
DC.L scDither32-scDirTab2 ;5 32 to 2 dither
|
||
DC.L scGray32-scDirTab2 ;6 32 to 2 gray
|
||
DC.L scDitherGray32-scDirTab2 ;7 32 to 2 gray+dither
|
||
|
||
;4-Bit Blits
|
||
scDirTab4
|
||
DC.L scCopy16toIndexed-scDirTab4 ;0 16 to 4
|
||
DC.L scDither16-scDirTab4 ;1 16 to 4 dither
|
||
DC.L scGray16-scDirTab4 ;2 16 to 4 gray
|
||
DC.L scDitherGray16-scDirTab4 ;3 16 to 4 gray+dither
|
||
DC.L scCopy32toIndexed-scDirTab4 ;4 32 to 4
|
||
DC.L scDither32-scDirTab4 ;5 32 to 4 dither
|
||
DC.L scGray32-scDirTab4 ;6 32 to 4 gray
|
||
DC.L scDitherGray32-scDirTab4 ;7 32 to 4 gray+dither
|
||
|
||
;8-Bit Blits
|
||
scDirTab8
|
||
DC.L scCopy16toIndexed-scDirTab8 ;0 16 to 8
|
||
DC.L scDither16-scDirTab8 ;1 16 to 8 dither
|
||
DC.L scGray16-scDirTab8 ;2 16 to 8 gray
|
||
DC.L scDitherGray16-scDirTab8 ;3 16 to 8 gray+dither
|
||
DC.L sc32to8-scDirTab8 ;4 32 to 8
|
||
DC.L sc32to8Dither-scDirTab8 ;5 32 to 8 dither
|
||
DC.L sc32to8gray-scDirTab8 ;6 32 to 8 gray
|
||
DC.L sc32to8gray-scDirTab8 ;7 32 to 8 gray+dither
|
||
;*** should probably do a 32to8gray dither as well ***
|
||
|
||
;16-Bit Blits
|
||
scDirTab16
|
||
DC.L Bogus-scDirTab16 ;0 16 to 16
|
||
DC.L Bogus-scDirTab16 ;1 16 to 16 dither
|
||
DC.L Bogus-scDirTab16 ;2 16 to 16 gray
|
||
DC.L Bogus-scDirTab16 ;3 16 to 16 gray+dither
|
||
DC.L scCopy32to16-scDirTab16 ;4 32 to 16
|
||
DC.L scCopy32to16-scDirTab16 ;5 32 to 16 dither
|
||
DC.L scCopy32to16-scDirTab16 ;6 32 to 16 gray
|
||
DC.L scCopy32to16-scDirTab16 ;7 32 to 16 gray+dither
|
||
|
||
;32-Bit Blits
|
||
scDirTab32
|
||
DC.L scCopy16to32-scDirTab32 ;0 16 to 32
|
||
DC.L scCopy16to32-scDirTab32 ;1 16 to 32 dither
|
||
DC.L scCopy16to32-scDirTab32 ;2 16 to 32 gray
|
||
DC.L scCopy16to32-scDirTab32 ;3 16 to 32 gray+dither
|
||
DC.L Bogus-scDirTab32 ;4 32 to 32
|
||
DC.L Bogus-scDirTab32 ;5 32 to 32 dither
|
||
DC.L Bogus-scDirTab32 ;6 32 to 32 gray
|
||
DC.L Bogus-scDirTab32 ;7 32 to 32 gray+dither
|
||
|
||
;
|
||
;
|
||
;-----------------------------------------------------------------
|
||
;
|
||
;
|
||
|
||
;Source is Indexed data
|
||
|
||
;1-Bit Blits
|
||
scIndTab1
|
||
DC.L scIndToInd-scIndTab1 ;0 1 to 1 <5JUNE92 SAH>
|
||
DC.L scIndToInd-scIndTab1 ;1 2 to 1 <5JUNE92 SAH>
|
||
DC.L scIndToInd-scIndTab1 ;2 4 to 1 <5JUNE92 SAH>
|
||
DC.L scInd8ToInd1-scIndTab1 ;3 8 to 1 <14SEP90 SMC>
|
||
|
||
;2-Bit Blits
|
||
scIndTab2
|
||
DC.L scInd1ToInd2-scIndTab2 ;0 1 to 2 <14SEP90 SMC>
|
||
DC.L scIndToInd-scIndTab2 ;1 2 to 2 <5JUNE92 SAH>
|
||
DC.L scIndToInd-scIndTab2 ;2 4 to 2 <5JUNE92 SAH>
|
||
DC.L scIndToInd-scIndTab2 ;3 8 to 2 <5JUNE92 SAH>
|
||
|
||
;4-Bit Blits
|
||
scIndTab4
|
||
DC.L scInd1ToInd4-scIndTab4 ;0 1 to 4 <14SEP90 SMC>
|
||
DC.L scIndToInd-scIndTab4 ;1 2 to 4 <5JUNE92 SAH>
|
||
DC.L scIndToInd-scIndTab4 ;2 4 to 4 <5JUNE92 SAH>
|
||
DC.L scIndToInd-scIndTab4 ;3 8 to 4 <5JUNE92 SAH>
|
||
|
||
;8-Bit Blits
|
||
scIndTab8
|
||
DC.L scInd1ToInd8-scIndTab8 ;0 1 to 8 <14SEP90 SMC>
|
||
DC.L scIndToInd-scIndTab8 ;1 2 to 8 <5JUNE92 SAH>
|
||
DC.L scIndToInd-scIndTab8 ;2 4 to 8 <5JUNE92 SAH>
|
||
DC.L scInd8ToInd8-scIndTab8 ;3 8 to 8 <14SEP90 SMC>
|
||
|
||
;16-Bit Blits
|
||
scIndTab16
|
||
DC.L scIndexedto16-scIndTab16 ;0 1 to 16 <5JUNE92 SAH>
|
||
DC.L scIndexedto16-scIndTab16 ;1 2 to 16 <5JUNE92 SAH>
|
||
DC.L scIndexedto16-scIndTab16 ;2 4 to 16 <5JUNE92 SAH>
|
||
DC.L scIndexedto16-scIndTab16 ;3 8 to 16 <5JUNE92 SAH>
|
||
|
||
;32-Bit Blits
|
||
scIndTab32
|
||
DC.L scIndexedto32-scIndTab32 ;0 1 to 32
|
||
DC.L scIndexedto32-scIndTab32 ;1 2 to 32
|
||
DC.L scIndexedto32-scIndTab32 ;2 4 to 32
|
||
DC.L scIndexedto32-scIndTab32 ;3 8 to 32
|
||
|
||
;
|
||
;
|
||
;-----------------------------------------------------------------
|
||
|